| "A day of joy and pride" : a history of the Church of Our Lady of Lourdes | Durnin, Peter | Article in Journal | | 2000 |
| "At the feet of Gabriel" : a short history of the Holy Trinity parish, Schull. Diocese of Cork | Gibson, Charles G. | Monograph or Collective Volume | [Holy Trinity parish, Schull] | 1953 |
| "Colmcille ... built many chapels and churches in Tir Chonaill" : investigating the evidence | Ó Domhnaill, Adhamhnán | Monograph or Collective Volume | The author | 1997 |
| "Commitment being our challenge" : a history of the parish of Tullanisken, Newmills, Co. Tyrone | Donnelly, Eileen Elizabeth | Monograph or Collective Volume | Imprint [printer] | 1993 |
| "Eden in Albion" : a history of the Mikveh in Britain | Kadish, Sharman, 1959- | Article in Book | Vallentine Mitchell | 1996 |
| "Gloom and grandeur" or the threshing floor : the manufacture of ecclesiastical ruins in nineteenth-century Ireland | Ní Cheallaigh, Máirín | Article in Book | | 2005 |
| "Got Cork" ; an exhibition on the occasion of the centenary of William Burges 1827-1881, architect of St. Fin Barre's cathedral | Carey, Maurice | Monograph or Collective Volume | Crawford Municipal Art gallery | 1983 |
| "Holye crossys" : a catalogue of processional, altar, pendant and crucifix figures for late medieval Ireland | Hourihane, Colum P., 1955- | Article in Journal | | 2000 |
| "I lift up mine eyes" : A Re-evaluation of the tower in Cistercian architecture in Britain and Ireland | Harrison, Stuart | Article in Book | Brepols | 2004 |
| "Notabilia" of the Diocese of Ossory | Neary, P., C.C. | Article in Journal | | 1879 |
| "Protected space" in Britain and Ireland in the middle ages | Davies, Wendy, 1942- | Article in Book | Scottish Cultural | 1996 |
| "The Ford of Ae" : some historical notes on the town of Athy | Comerford, Michael, Coadjutor Bishop of Kildare and Leighlin | Article in Journal | | 1895 |
| "The wanderings/travels of my Lysaght forebears" | Mitchell, Joanne | Article in Journal | | 2002 |
| "The wee church on the hill" : a history of Drumtullagh Church, 1841-1991 | Quigg, L. F. | Monograph or Collective Volume | Impact Printing (Coleraine and Ballycastle) [Printer] | 1991 |
| "To be named is to exist" : the instructive case of Achadh Bolg (Aghabulloge) | Ó Riain, Pádraig | Article in Book | | 1993 |
| "What a fool I have been" : Fr. Robert O'Keeffe, parish priest and the Callan controversy 1869-1881 | Hogan, Patrick | Article in Book | Philip P. Lynch in co-operation with Callan Heritage Society | 2010 |
| 'A goodly heritage' : the 18th-century music archive at Christ Church Cathedral, Dublin | Hemmens, Susan | Article in Journal | | 2014 |
| 'A noble church in the most Catholic quarter of a bitterly Protestant and Presbyterian city': the Church of the Most Holy Redeemer, Clonard, West Belfast | McGee, Caroline M. | Article in Book | Irish Academic Press | 2013 |
| 'A stained glass window in the Glens' | Rogers, Frank | Article in Journal | | 2015 |
| 'A star of the first magnitude' : William Bedell (1571-1642), bishop of Kilmore and Gaelic culture | Caball, Marc | Article in Book | Cumann Seanchais Bhreifne | 2025 |
| 'A star of the first magnitude' : William Bedell (1571-1642), bishop of Kilmore and Gaelic culture | Caball, Marc | Article in Book | Geography Publications | 2014 |
| 'All gorgiusly wrought' : Renaissance influence at Christ Church cathedral, Dublin | Kinsella, Stuart | Article in Book | Four Courts Press | 2011 |
| 'All that Peter stands for' : the Romanitas of the Codex amiatinus reconsidered | O'Reilly, Jennifer | Article in Book | Oxford University Press for the British Academy | 2009 |
| 'All well here': the Diary of Bishop Joseph Stock, 1811 | Flaherty, Cian | Article in Journal | | 2019 |
| 'Almoners of Providence' : the clergy 1647 to c. 1780 | Barnard, T. C. (Toby Christopher) | Article in Book | Four Courts Press | 2006 |
| 'An ambiguous awe' : Paul Cullen and the historians | Barr, Colin | Article in Book | Four Courts Press | 2011 |
| 'An overriding providence' : the life and ministry of Tresham Dames Gregg (1800-81) | Crawford, John, 1953-2011 | Article in Book | Four Courts Press | 2006 |
| 'Archive of the month' : The RCB Library reaches out to a worldwide audience | Hood, Susan | Article in Journal | | 2014 |
| 'Attending to the wants of poverty' : Paul Cullen, the relief of poverty and the development of social welfare in Ireland | Crossman, Virginia | Article in Book | Four Courts Press | 2011 |
| 'Bulwark of the nations': Paul Cullen, the Christian Brothers, and the evangelization of an Irish empire | Keogh, Dáire | Article in Book | Four Courts Press | 2012 |
| 'But what exactly did she give?' Derbforgaill and the Nuns' Church at Clonmacnoise | Ní Ghrádaigh, Jenifer | Article in Book | Wordwell | 2003 |
| 'Calendar of Archbishop Alen's register', 1950 | O'Sullivan, J. F. | Article in Journal | | 1951 |
| 'Chalices have wings' | Krasnodebska-D'Aughton, Malgorzata | Article in Book | Wordwell | 2009 |
| 'Collegium S. Antonii Lovanii, quod Collegium est unicum remedium ad conservandam Provinciam' (Donnchadh Ó Maonaigh, 1617-18) | Mac Craith, Mícheál | Article in Book | Four Courts Press | 2009 |
| 'Drong' and 'Dál' as synonyms for 'Óenach' | MacCotter, Paul | Article in Journal | | 2012 |
| 'Eagla an Ghallsmacht': the religion and politics of Irish catholics,1620s-1670s | Kennedy, Mary Catherine | Thesis | | 1987 |
| 'Early medieval "monastic towns"' or "forts and fields" : reflections on the urban character of Viking age ecclesiastical settlements in light of the emerging archaeological evidence | Harney, Lorcan | Article in Journal | | 2018 |
| 'God bless your free Church of Ireland' : Wentworth, Laud, Bramhall and the Irish Convocation of 1634 | McCafferty, John | Article in Book | | 1996 |
| 'He came to her bed pretending courtship': sex, courtship and the making of marriage in Ulster, 1750-1844 | Calvert, Leanne | Article in Journal | | 2018 |
| 'Holy Entrepreneur': Agilbert, a Merovingian bishop between Ireland, England and Francia | Hammer, Carl I.
| Article in Journal | | 2012 |
| 'Holy, holier, holiest' : the sacred topography of the earliest medieval Irish church | Jenkins, David Harold | Monograph or Collective Volume | Brepols | 2010 |
| 'In imitation of that holy patron of prelates the blessed St. Charles' : episcopal activity in Ireland and the formation of a confessional identity, 1618-1653 | Ó hAnnracháin, Tadhg | Article in Book | | 2005 |
| 'Mindful of her St. Columbas and Gaels ': Ireland, empire and Australian Anglicanism, 1788-1850 | Gladwin, Michael | Article in Book | | 2015 |
| 'My repeated troubles' : Dr James Gallagher (bishop of Raphoe 1725-37) and the impact of the Penal Laws | Mac Murchaidh, Ciarán | Article in Book | | 2011 |
| 'New and elegant chapels, either built or in the act of building' : St John the Baptist, Cashel, and Catholic architecture in an era of relief and reform | NicGhabhann Coleman, Niamh | Article in Journal | | 2024 |
| 'New Light' thinking and non-subscription amongst Protestant dissenters in England and Ireland in the early 18th century and their relationship with Glasgow University and Scotland | Steers, David | Thesis | | |
| 'Not ... an equal, but ... one of his subjects' : John Henry Newman's perception of the archbishop of Dublin | Ker, Ian | Article in Book | | 2011 |
| 'Nuair a bhí an Slánaitheoir ag siúl ar an talamh' : scéalta mínithe cráifeacha sa traidisiún béil | Ó Héalaí, Pádraig | Article in Book | | 2007 |
| 'Over the storm-swelled sea' : early medieval ecclesiastical migration from northern Britain to Ireland | Plumb, Oisín Kingsley Paul | Thesis | | |
| 'Powerful adversaries' : the Knights Templar, landholding and litigation in the lordship of Ireland | Coleman, Edward | Article in Book | | 2015 |
| 'Raising the roof' in the middle ages | Geaney, Máire | Article in Book | | 2007 |
| 'Res, tempus, locus, persona': Adomnán's exegetical method | O'Loughlin, Thomas | Article in Journal | | 1997 |
| 'Si quaeris monumentum, circumspice' William Robertson (1770-1850), Kilkenny's first architect | Lucey, John | Article in Journal | | 2018 |
| 'Slow and cold in the true service of God' : popular beliefs and practices, conformity and Reformation in Wales, c.1530-1600 | Olson, Jatharine K. | Article in Book | | 2014 |
| 'Soldier of Christ' : the political and ecclesiastical career of Nicholas French, Catholic bishop of Ferns (1603-1678) | McHugh, Jason | Thesis | | 2005 |
| 'Srong views ... in very strong forms' : Paul Cullen, archbishop of Armagh, 1849-52 | Macaulay, Ambrose | Article in Book | | 2011 |
| 'Stair Mhlaise ar Dhartraighibh déin' by Sighraidh Ó Cuirnín : a poem on the rights and privileges of the Coarb of Saint Molaise over Dartraighe | Smith, Peter J. | Article in Journal | | 2018 |
| 'The Church-Going Bell': a sermon preached in the Parish church of S. Patrick, Coleraine, at the dedication of a memorial peal of bells on Easter Day, April 2, 1893 | Lawlor, H. J. (Hugh Jackson), 1860-1938 | Monograph or Collective Volume | W. & G. Baird [Printer] | 1893 |
| 'The curious incident of the dog in the night-time': the pre-Reformation Church in Wales | Gray, Madeleine | Article in Book | | 2014 |
| 'The only lever...?', The Catholic priest in Irish politics, 1823-29 | O'Ferrall, Fergus | Article in Journal | | 1981 |
| 'The Vile System of Altar Denunciation'. The case of Fr Anthony Nolan, PP, Monsea Co. Tipperary | Grace, Daniel | Article in Journal | | 2012 |
| 'Theatres of worship' : Dissenting meeting houses in Dublin, 1650-1750 | ffeary-Smyrl, Steven | Article in Book | | 1995 |
| 'To keep hospitality' : bishops, banquets and buildings, 1660-1714 | O'Rourke, Liam | Article in Book | Four Courts Press | 2025 |
| 'Trading patria for peregrinatio' ; the Irish in medieval Europe | Ó Riain, Diarmuid | Article in Book | | 2025 |
| 'Unsightly and unbecoming' : the progress of the Gothic revival in a metropolitan parish | Casey, Christine | Article in Book | | 2008 |
| 'Vested' interests and debt bondage : credit as confessional coercion in colonial Ireland | Moore, Seán | Article in Book | | 2011 |
| 'We shall find a way through' : the Church of Ireland, state prayers and liturgical realities | Ó Corráin, Daithí | Article in Book | | 2006 |
| 'With much quiet fervour' : A brief history of Dunlavin Roman Catholic parish and St. Nicholas of Myra church | Lawlor, Chris | Monograph or Collective Volume | Chris Lawlor | 2018 |
| 150th anniversary of Kilcronaghan Parish Church | Richardson, H. Hilary | Monograph or Collective Volume | Kilcronaghan Parish Church | 2008 |
| 1696-1996 : St. Paul's Church, Portarlington, 'the French church' : an illustrated history | Powell, J. S. (John Stocks) | Monograph or Collective Volume | Portarlington and Monasterevan Parish of the Church of Ireland | 1996 |
| 17th century church plate from Co. Clare | Lynch, Michael | Article in Journal | | 2004 |
| 18th century documents relating to the parish of St. Michan, Dublin | Young, E. J. | Article in Journal | | 1933 |
| 1916, the Church and the Rising | NA | Monograph or Collective Volume | The Irish Catholic | 2016 |
| 2020 ..... A year of anniversaries | Finlay, John | Article in Journal | | 2020 |
| 20th century | Hurley, Richard | Article in Book | | 2000 |
| 250 years of farming in Mountshannon | Cahill, Ned | Article in Book | | 1993 |
| 75th anniversary year (1933-2008) : The story of Saint Martin's Church and the Southern Church mission to Ballymacarrett | McMullan, Gordon | Monograph or Collective Volume | [St Martin's Church] | 2008 |
| A 1555 papal 'bulla' for Clare Abbey | McInerney, Luke | Article in Journal | | 2011 |
| A 15th century Medieval Aisle Altar, Sligo Dominican Abbey | Higgins, JimTimoney, Martin A. | Article in Journal | | 2022 |
| A baptismal font at Wyanstown, Co. Louth | Cahill, Mary | Article in Journal | | 1983 |
| A bishop backs Sinn Féin | Fogarty, Michael, Bishop of Killaloe | Article in Book | | 2016 |
| A Bishop of penal times: the life and times of John O'Brien, Bishop of Cloyne and Ross, 1701-1769 | Coombes, James | Monograph or Collective Volume | Tower Books | 1981 |
| A bishop of the MacCarthy's : Dr Florence MacCarthy (1761-1810) | Walsh, T. J. | Article in Journal | | 1951 |
| A brief account of the Cathedral Church of the Blessed Trinity (Christ Church), Waterford : its history and monuments. also of the Holy Ghost Friary, or, 'French Church' of Waterford and the ancient Danish Church of St. Olaf | | Monograph or Collective Volume | [Waterford Cathedral] | 1967 |
| A brief account of the Magdalen Chapel Lower Leeson Street, Dublin : its foundress, its benefactors, list of clergy and chaplains | Peter, A. | Monograph or Collective Volume | Hodges, Figgis | 1907 |
| A brief history and description of St. Savior's Priory, commonly called Blackfriars, Waterford | Lumley, I. W. J. | Article in Journal | | 1977 |
| A brief history of the Church of St. Patrick, Coleraine, with some account of its proposed renovation | [St. Patrick's Church, Coleraine] | Monograph or Collective Volume | Constitution Office [Printer] | 1883 |
| A brief history of the Parish of St. Paul's, Gilford, Diocese of Dromore, 1869-1999 | Patterson, A. P. | Monograph or Collective Volume | [The author] | 1999 |
| A British patriarchy? : ecclesiastical imperialism under the early Stuarts | Morrill, John Stephen, 1946- | Article in Book | | 1994 |
| A calendar of Papal Registers relating to Clonfert Diocese | Larkin, Patrick | Monograph or Collective Volume | Patrick Larkin | 2017 |
| A calendar of the letters of Thomas Bray, Archbishop of Cashel, 1792-1820 | Meagher, Mary T. | Thesis | | 1966 |
| A calendar of the papers of Michael Slattery, archbishop of Cashel, 1834-57 | Tierney, Mark | Thesis | | 1965 |
| A calendar of the reassembled register of John Bole, archbishop of Armargh, 1457-1471 | Lynch, A. | Article in Journal | | 1992 |
| A catalogue of misericords in Great Britain | Remnant, G. L. | Monograph or Collective Volume | | 1969 |
| A catalogue of the Bishops of Raphoe to A.D. 1600 | Jefferies, Henry A. | Article in Journal | | 1997 |
| A cathedral : a chair-church | Flannery, Austin OP | Article in Book | | 1998 |
| A cathedral of its time | Macaulay, Ambrose | Article in Book | | |
| A cathedral renewed : St Macartan's Monaghan | | Monograph or Collective Volume | The Columba Press | 1998 |
| A cathedral renewed : St Macartan's Monaghan | Griffin, Elthin | Monograph or Collective Volume | Columba | 1998 |
| A century old 'The Harry Clarke Nativity window in St Patrick's Church | O'Reilly, Vincent | Article in Journal | | 2023 |
| A challenging island? | Brown, TonyFonvelle, ThierryPears, Ben | Article in Journal | | 2020 |
| A changing church | Murphy, Brian | Article in Book | | 2005 |
| A charge addressed to the clergy of the Dioceses of Armagh and Clogher at the Annual Visitation, 1864 | Gervais, Marcus | Monograph or Collective Volume | Hodges, Foster | 1865 |
| A charge delivered to the clergy of the united dioceses of Cork, Cloyne, and Ross at the ordinary visitation, October 1867 | Gregg, John | Monograph or Collective Volume | Hodges, Smith | 1867 |
| A charge delivered to the clergy of the united dioceses of Cork, Cloyne, and Ross at the ordinary visitation, October 1882 | Gregg, Robert S. | Monograph or Collective Volume | George Herbert | 1882 |
| A charge delivered to the clergy of the united dioceses of Cork, Cloyne, and Ross, at his primary visitation, in September, 1863 | Gregg, John | Monograph or Collective Volume | William Curry | 1863 |
| A charge delivered to the clergy of the united dioceses of Cork, Cloyne, and Ross, at the ordinary visitation, October 1866 | Gregg, John | Monograph or Collective Volume | Hodges, Smith | 1866 |
| A Church of Ireland diocese in the age of Catholic emancipation | Brynn, Edward | Article in Journal | | 1971 |
| A church of Ireland parish in County Cork | McCutcheon, Sam | Monograph or Collective Volume | Christian Stewardship committee, St Luke's, Douglas. | 1983 |
| A church's tercentenary : Ballywalter | Stewart, David | Monograph or Collective Volume | [The author] | 1926 |
| A clerical dogfight, 1767-1772 : the appointment of Archbishop James Butler II of Cashel | Moloney, John | Article in Journal | | 1983 |
| A clerical retrospect | Haddock, Josiah | Monograph or Collective Volume | Lurgan Mail Press | 1957 |
| A comment on Fr. Aubrey Gwynn's 'The medieval province of Armagh' | Ó Ceallaigh, Séamus | Article in Journal | | 1953 |
| A companion guide to architecture in Ireland, 1837-1921 | Girouard, MarkWilliams, Jeremy | Monograph or Collective Volume | Irish Academic Press | 1994 |
| A companion to Britain in the later middle ages | | Monograph or Collective Volume | Blackwell, in association with the Historical Association | 2003 |
| A complete Catholic directory, almanack, and registry | [Battersby, W. J.] | Monograph or Collective Volume | | 1836 |
| A corner of Buttevant | Daly, Albert H. | Monograph or Collective Volume | [The author] | No date given |
| A critical analysis of the decisions of the General Assembly of the Presbyterian Church in Ireland on social issues, 1921-1970 | Davison, William Eoin | Thesis | | |
| A crozier and bell from Inishmurray and their place in ninth-century Irish archaeology | Bourke, Cormac | Article in Journal | | 1985 |
| A crozier knop from County Tipperary : a preliminary note | Holland, Patrick | Article in Journal | | 2006 |
| A cryptic puzzle from medieval Dublin | O'Keeffe, Tadhg | Article in Journal | | 2017 |
| A current directory of "listed" and other important buildings in Coleraine | Anderson, Robert | Article in Journal | | 2018 |
| A cursory visit to the old churches of Glenmore | Farrell, E., P.P. | Article in Journal | | 1879 |
| A day in thy courts : the story of Newtownbreda Presbyterian church, 1984-1992 | Ross, Ronald | Monograph or Collective Volume | Newtownbreda Presbyterian Church | 1992 |
| A description of Clogher cathedral in the early sixteenth century | Haren, M. J. | Article in Journal | | 1985 |
| A descriptive and historic guide through St. Mary's Cathedral, Limerick | Meredyth, Francis | Monograph or Collective Volume | George McKern & Sons | 1887 |
| A dominant church : the diocese of Achonry 1818-1960 | Swords, Liam | Monograph or Collective Volume | Columba | 2004 |
| A dream comes true... the story of the building of St. Hilda's Parish Chruch | Moore, Edward James | Monograph or Collective Volume | Belfast News Letter Printing Co. [Printer] | 1970 |
| A failure of leadership? Bishop Edward Staples and the Reformation in Meath, 1529-1554 | Scott, Brendan | Article in Book | | 2015 |
| A Field Guide to the Buildings of Ireland : illustrating the smaller buildings of town and countryside | Rothery, Sean | Monograph or Collective Volume | Lilliput | 1997 |
| A flying visit to Bishop's Island, Co. Clare | O'Sullivan, JerryÓ Caoimh, TomásÓ Carragáin, Tomás | Article in Journal | | 2005 |
| A forgotton church in East Galway: the Abbey of Cormicans of Abbeygormacan | Larkin, Patrick | Article in Journal | | 2015 |
| A fourteenth-century historical compilation from St Mary's Cistercian abbey, Dublin | Meehan, Bernard | Article in Book | | 2016 |
| A Galway made chalice from north county Clare | Lynch, Michael | Article in Journal | | 2013 |
| A Glendalough bishop in Germany? The Four Masters and the three Gilla na Náems | Ó Riain, Diarmuid | Article in Book | | 2011 |
| A glorious extravaganza : the history of Monkstown parish church | Murphy, Etain | Monograph or Collective Volume | Wordwell | 2003 |
| A glorious treasury - The stained glass windows in the church at Desertegney | Walsh, John R. | Article in Journal | | 2009 |
| A golden vision; John O'Connell, Bertram Windle and the Honan bequest | Teehan, Virginia | Article in Book | | 2004 |
| A Greek cross in Dungiven | Tracey, Joe | Article in Journal | | 2000 |
| A group of related synodal statutes of the 13th century | Cheney, Christopher Robert | Article in Book | | 1961 |
| A guide to Connemara's early Christian sites | Previté, Anthony | Monograph or Collective Volume | Oldchapel Press | 2008 |
| A guide to local history sources in the Public Record Office of Northern Ireland | Bardon, Jonathan, 1941- | Monograph or Collective Volume | Blackstaff Press | 2000 |
| A Guide to the Cathedral Church of S. Columb, Derry | Hayes, Richard | Monograph or Collective Volume | Sentinel Office [printer] | 1916 |
| A guide to the stained glass of Christ Church Cathedral, Dublin | Whiteside, Lesley | Monograph or Collective Volume | Christ Church Cathedral | 2010 |
| A Hidden Church: The Diocese of Achonry, 1689-1818 | Swords, Liam | Monograph or Collective Volume | The Columba Press | 1997 |
| A High Cross fragment from Killeeshil, county Tyrone | Foley, Claire | Article in Journal | | 2018 |
| A historical report on the church of St. Anne, Mallow | | Monograph or Collective Volume | [The author] | 1976 |
| A history of Ballindrait church and its people | Mahaffy, Belinda | Monograph or Collective Volume | Ballindrait Presbyterian Church | 2008 |
| A history of Cloneyharp National School, 1837-1979 | Carroll, TomRyan, Con, | Monograph or Collective Volume | Walsh Printers | 2014 |
| A history of Dunderry. Part 1 | Keely, JohnKeely, Patrick | Monograph or Collective Volume | [Dunderry History Group] | 2005 |
| A history of Glencraig Parish | Hill, George W. L.Maconachie, Alwyn | Monograph or Collective Volume | William Trimble [Printer] | 1978 |
| A history of Holy Cross Lisnaskea | Rogers, Frank | Monograph or Collective Volume | Frank Rogers | 2006 |
| A history of Holy Trinity church and parish of Rathclaren | Harvey, Brian | Monograph or Collective Volume | [The Author] | 2001 |
| A history of Irish diocesan collections through a Limerick lens | Bracken, David | Article in Journal | | 2017 |
| A history of Killeevan parish, Diocese of Clogher | Forster, V. H. | Monograph or Collective Volume | [R. & S. Printers] | 1958 |
| A history of Kilmore parish, County Armagh: a journey through time | Reilly, Patricia | Monograph or Collective Volume | Trimprint | 2009 |
| A history of Milltown parish, The Birches, north-west Armagh | Coffey, H.W. | Monograph or Collective Volume | Portadown News [printer] | 1951 |
| A history of Mullingar Presbyterian Church | Lockington, John W. | Monograph or Collective Volume | The author | 2013 |
| A history of Shelagh Chapel: parish of upper Creggan in Louth and Armagh, 1838-2013 | Agnew, Una | Article in Journal | | 2013 |
| A history of St George's church, Belfast: two centuries of faith, worship and music | Walker, Brian M. | Monograph or Collective Volume | Ulster Historical Foundation | 2012 |
| A history of St Mary's church, Gowran | Kehoe, Imelda | Monograph or Collective Volume | Gowran Development association | 1992 |
| A history of St. James' Church, Belfast | | Monograph or Collective Volume | St James's Select Vestry | 2000 |
| A history of St. John's church, Donegore | Bell, Margaret | Monograph or Collective Volume | W. & G. Baird at the Greystone Press, Antrim [printer] | 1988 |
| A history of St. Peter's parish church, Antrim Road, Belfast 1900-2009 | Barton, Brian | Monograph or Collective Volume | Select Vectry of St. Peter's Parish Church | 2009 |
| A history of the Catholic Church for schools. Vol. 4 | Mahony, J. | Monograph or Collective Volume | Educational Company of Ireland | 1950 |
| A history of the Church of Ireland in Dunluce Parish | Boyd, Hugh Alexander | Monograph or Collective Volume | Coleraine Chronicle [Printer] | 1937 |
| A history of the Church of Ireland in Ramoan Parish | Boyd, Hugh Alexander | Monograph or Collective Volume | R. Carswell & Son | 1930 |
| A history of the Church of Ireland in St. Mary Magdalene parish, Belfast | Leathem, William S. | Monograph or Collective Volume | Nicholson & Bass | 1939 |
| A history of the Church of Ireland in the parish of Ballywillan (Portrush) | Milner, T. W. R. | Monograph or Collective Volume | Display Aids [Printer] | 1972 |
| A history of the development of St Brendan's Cathedral, Ardfert | O'Sullivan, Marie | Article in Journal | | 1988 |
| A history of the diocese of Cork : the episcopate of William Delany : 1847-1886 | Bolster, Evelyn | Monograph or Collective Volume | Tower Books | 1993 |
| A history of the diocese of Cork from the penal era to the Famine | Bolster, Evelyn | Monograph or Collective Volume | Tower Books | 1989 |
| A history of the diocese of Killaloe, Vol. 1 | Gleeson, Dermot F.Gwynn, Aubrey | Monograph or Collective Volume | Gill | 1962 |
| A history of the diocese of Raphoe | Maguire, Edward | Monograph or Collective Volume | [s.n.] | 1920 |
| A history of the Irish Church, 400-700 AD | Bradley, ThomasWalsh, J. R. | Monograph or Collective Volume | | 1991 |
| A history of the Irish church, 400-700 AD | Bradley, ThomasWalsh, John R. | Monograph or Collective Volume | Columba | 1993 |
| A history of the medieval diocese of Cloyne | MacCotter, Paul | Monograph or Collective Volume | Columba | 2013 |
| A history of the parish and churches of Marlestown | Young, Jean | Article in Journal | | 2014 |
| A history of the Parish of Kilbride (Diocese of Connor) | Cox, Robert R. | Monograph or Collective Volume | [Kilbride Parish] | 1959 |
| A hundred years on. St Bride's Church Ballintober | Brady John | Article in Journal | | 1998 |
| A Knight on the Tile | Corlett, Christiaan | Article in Journal | | 2018 |
| A late eighteenth-century Catholic chapel at Kilmurry, county Wicklow | Corlett, ChrisHicks, Therese | Article in Journal | | 2018 |
| A lecture on the history of the bishops of Cork and cathedral of St Fin Barre | Caulfield, Richard | Monograph or Collective Volume | Purcell & Co., Printers | 1864 |
| A life of Patrick Cardinal O'Donnell | Gallagher, John P. | Thesis | | 1975 |
| A list of Dominicans in Ireland, 1817 | Tenning, Hugh | Article in Journal | | 1966 |
| A list of freeholders of Kilfenora diocese in 1601 | McInerney, Luke | Article in Journal | | 2018 |
| A list of the altar plate at Saint Francis, Cork | Conlan, Patrick, 1940- | Article in Journal | | 1996 |
| A list of the monasteries in Connacht, 1577 | NA | Article in Journal | | 1972 |
| A look back at funeral offerings | MacLoone, John J. | Article in Journal | | 2009 |
| A lost ecclesiastical site in Fingal | Baker, Christine | Article in Journal | | 2004 |
| A man for his season : bishop Neil Farren of Derry, 1939-1973 | Canning, B. J. (Bernard J.) | Article in Journal | | 1989 |
| A man who 'did not seek the society of many': Bishop Edward McGennis (1846-1906) | Kelly, Liam | Article in Journal | | 2022 |
| A medieval bronze pax from Dunbrody Abbey, Co. Wexford, and the fate of ornamenta from suppressed religious houses in Ireland | Ó Floinn, Raghnall | Article in Book | | 2013 |
| A medieval carved wooden altar-support (?) from St Patrick’s well, Clonmel | Harbison, Peter | Article in Journal | | 1995 |
| A medieval holy water stoup from Newtownstalaban, County Louth | Campbell, Kieran | Article in Journal | | 2019 |
| A medieval island church in Lough Garadice | Earley, Joseph E.Ó Seaneachain, Diarmuid | Article in Journal | | 2015 |
| A medieval processional staff at Cloyne | Bourke, Cormac | Article in Journal | | 2009 |
| A meeting minds? : Margaret Aylward and Paul Cullen | Close, Anne-Marie | Article in Book | | 2011 |
| A memoir of the late Albert Blest | Motherwell, M. C. | Monograph or Collective Volume | | 1843 |
| A memorial for 'new' Kilbride parish church | Power, Patrick | Article in Journal | | 1990 |
| A mission re-imagined: All Hallows College | Dalzell, Thomas G. | Article in Book | | 2012 |
| A monastery among the glens | McDermott, ConorSeaver, MattWarren, Graeme | Article in Journal | | 2018 |
| A monstrance for St Macartan's cathedral | King, Richard Enda | Article in Book | | 1998 |
| A Mulrankin mystery | Scallan, Eithne | Article in Journal | | 2001 |
| A new Byzantium : the stained glass windows by Harry Clarke | Bowe, Nicola Gordon | Article in Book | | 2004 |
| A New Interpretation of Irish Round Towers: Their Secular Origin and Function in the Tenth to Twelfth Centuries | Freitag, Barbara | Monograph or Collective Volume | The Edwin Mellen Press | 2018 |
| A new perspective on Georgian building practice : the rebuilding of St Werburgh's church, Dublin (1754-59) | Severens, Kenneth | Article in Journal | | 1992 |
| A new source for the medieval history of the diocese of Armagh | Gwynn, Aubrey | Article in Journal | | 1955 |
| A new survey of Templecormick, Audleystown, County Down | MacDonald, Philip | Article in Journal | | 2008 |
| A new Wyatt church in Ireland | Moore, Jennifer | Article in Journal | | 2007 |
| A newly discovered Romanesque church on Devenish, county Fermanagh | Hamlin, Ann | Article in Journal | | 2002 |
| A newly-discovered Irish and Breton Computistica in Città del Vaticano, BAV, MS Reg. Lat. 123 | Bisagni, Jacopo | Article in Journal | | 2017 |
| A note on medieval figure sculpture at the medieval parish church of Tullaghmelan | Nugent, Louise | Article in Journal | | 2012 |
| A note on the building of St. Cronan's Church, Roscrea | Murphy, Ignatius | Article in Journal | | 1983 |
| A note on the divisions of time in the catalogue of the saints of Ireland | Graff, Eric | Article in Book | | 2015 |
| A note on the Uí Chiaróg clerical lineage of Rathbláthmaic | McInerney, Luke
| Article in Journal | | 2012 |
| A note on the Uí Mhaoir of Drumcliff, Co. Clare | McInerney, Luke | Article in Journal | | 2011 |
| A note on Trim and Sletty | Byrne, Francis John, 1934- | Article in Journal | | 1984 |
| A notice of St. Patrick's Church, Jordanstown, in the parish of Carnmoney, and diocese of Connor, the first attempt in modern times to revive the Ancient Ecclesiastical Architecture of Ireland: together with brief memoirs of the Irish saints depicted in the windows of its chancel | | Monograph or Collective Volume | Printed for private distribution only. Strangeways & Walden (printers) | 1868 |
| A parish miscellany: a review of Donaghcloney Parish from earliest times to the present day | Haddock, Josiah | Monograph or Collective Volume | Lurgan Mail Press | 1957 |
| A pastoral instruction in the Irish language from the Right Rev. Gerald Teahan, bishop of Kerry to his diocesans in 1794 | | Article in Journal | | 1939 |
| A pastoral of Archbishop O'Reilly, 1788 | | Article in Journal | | 1961 |
| A patron for passers-by : Benedict Joseph Labre | | Article in Book | | 1998 |
| A people's church. The diocese of Achonry, the first thousand years : from the sixth to the seventeenth century | Swords, Liam | Monograph or Collective Volume | Columba | 2013 |
| A pictorial tour of Limerick Cathedral | Talbot, M. J. | Monograph or Collective Volume | Limerick Leader | 1966 |
| A plaque of books : the dispersal and disappearance of the diocesan libraries of the Church of Ireland | Connolly, Margaret | Article in Book | | 2004 |
| A poem on the rights of the coarb of Saint Molaisse | Ó Canann, Tomás G. | Article in Journal | | 1994 |
| A political biography of William King | Fauske, Christopher J. | Monograph or Collective Volume | Pickering and Chatto | 2011 |
| A political history of the Church of Ireland, 1801-45 | Brynn, Edward Paul | Thesis | | 1968 |
| A possible find of 12th century masonry | Flaherty, Pat | Article in Journal | | 2014 |
| A postscript to 1798: five letters of Myles Prendergast O.S.A. | Keogh, Dáire | Article in Journal | | 2009 |
| A pre-Famine murder in county Limerick | Curtis, Noreen | Article in Journal | | 2010 |
| A pre-Romanesque church at Slane | Manning, Conleth | Article in Journal | | 2008 |
| A preliminary account of the excavation of Clonrush church, Co. Clare | McCarthy, Karen | Article in Journal | | 1991 |
| A profile of Bernard Burke (1789-1861) | McGuire, Shane | Article in Journal | | 1987 |
| A project to re-house the St Canice's Cathedral Library from Kilkenny to Maynooth University Library | McCormack, BarbaraMurphy, Hugh | Article in Journal | | 2019 |
| A propos du synode de Whitby. Étude des observations astronomiques dans les Annales Irlandaises | Breen, AidanMc Carthy, Daniel P., 1945- | Article in Journal | | 2000 |
| A Protestant pioneer of Catholic emancipation | Rogers, Patrick | Article in Journal | | 1995 |
| A puzzle in store : the cathedral at Glendalough | Manning, Con | Article in Journal | | 2002 |
| A ramble : in search of the curious and interesting comprising : a visit to the royal dwelling-place at Rathmore, the Battlefield at Rathbeg, Donegore Moat, the Giant's Grave at Drumagorgon and to a cave-dwelling at Craighall | Smith, W. S. | Monograph or Collective Volume | Alexander Mayne [printer] | 1883 |
| A rare aspect of early Irish monasticism : the martyrdom of Donnán | Ní Chatháin, Próinséas | Article in Book | | 2010 |
| A Rare Gothic Style Medieval Stone Shrine at Claregalway Friary, Co. Galway | Higgins, Jim | Article in Journal | | 2024 |
| A Record of the history of Maynooth Church but principally of the Prebendaries of Maynooth and the Vicars of Laraghbryan | Blacker, George | Monograph or Collective Volume | Hodges, Smith | 1867 |
| A riot in Kilshannig and Glantane | Caughlan, A.J. | Article in Journal | | 2010 |
| A Romanesque boss and a loaf of bread at Monaincha, Co. Tipperary | Higgins, Jim | Article in Journal | | 2015 |
| A romanesque fresco in Cormac's [sic] Chapel | Crotty, G. | Article in Journal | | 1988 |
| A rough field : the story of Garvaghy parish, Co. Down | Musgrave, George,Thompson, Paul | Monograph or Collective Volume | [Garvaghy Parish] | 1999 |
| A rum affair in Demerera : and Guiana's Apostate Vicar, Rt. Rev. John Clancy | Fox, John | Article in Journal | | 2016 |
| A sailor on the seas of faith : the individual and the church in 'The Voyage of Máel Dúin': | Johnston, Elva | Article in Book | | 2003 |
| A second golden age : the Irish Franciscans, 1918-63 | Daly, Mary E. | Article in Book | | 2009 |
| A second Ogham stone at Clara | Manning, ConlethMoore, Fionnbarr | Article in Journal | | 1997 |
| A select prosopography of some Irish Franciscans on the continent | Fennessy, Ignatius | Article in Book | | 2009 |
| A seventeenth-century Irish version of the rule of St. Clare : glossarial Index | | Article in Journal | | 1950 |
| A short account of Rockcorry parish and church, County Monaghan and Diocese of Clogher | Sirr, W. J. | Monograph or Collective Volume | Sligo Stationery Depot | c. 1950 |
| A short ecclesiastical survey of Golden Kilfeacle to serve as a memory of the re-opening of the church of the Blessed Sacrament, Golden | Ní Chearra, Máire | Monograph or Collective Volume | The author | 1991 |
| A short history of Donagh parish | Cotter, J. B. D. | Monograph or Collective Volume | Fermanagh Times | 1966 |
| A short history of Drumgooland parish | Rudd, C. R. J. | Monograph or Collective Volume | Outlook Press [Printer] | 1971 |
| A short history of Duneane parish | Macourt, W. A., Rev. | Monograph or Collective Volume | [Duneane Parish Church] | 1950 |
| A short history of Keady parish, its church & people | Hogg, M. B. (Matthew Banks) | Monograph or Collective Volume | Ulster Gazette | 1928 |
| A short history of Magheraculmoney parish | Baillie, F. A., Rev. | Monograph or Collective Volume | L. M. Press [printer] | 1984 |
| A short history of Rossorry parish | Rogers, Mary | Monograph or Collective Volume | Fermanagh Times [printer] | 1974 |
| A short history of Roundwood Parish Hall | Timmons, Martin C. | Article in Journal | | 2007 |
| A short history of some Dublin parishes. Parts 15-17 | Donnelly, Nicholas | Monograph or Collective Volume | Carraig Books | 1983 |
| A short history of St John's Church, Limerick | Stewart, D. (Miss) | Monograph or Collective Volume | [St John's Church] | 1952 |
| A short history of the convent chapel | Saunders, Assumpta | Article in Book | | 2010 |
| A short history of the Diocese of Elphin | Mooney, Canice | Article in Book | | 2000 |
| A Short history of the Parish of Ballyclug | Mitchell, F. J. | Monograph or Collective Volume | James A. Nelson [printer] | 1944 |
| A short history of the Parish of Dromara Ireland | Long, S.E. | Monograph or Collective Volume | Mourne Observer [Printer] | 1979 |
| A short history of the parish of Kilroot : Diocese of Connor | Rankin, Helen | Monograph or Collective Volume | Renewal Communications Ltd. | 1982 |
| A short-title calendar of the papers of Archbishop James Butler II in archbishop's house, Thurles, 1, 1764-86 | Tierney, Mark | Article in Journal | | 1978 |
| A short-title calendar of the papers of Archbishop Michael Slattery in Archbishop's House, Thurles : Part 2, 1840-1845 | Tierney, Mark | Article in Journal | | 1990 |
| A short-title calendar of the papers of archbishop Michael Slattery in archbishop's house, Thurles : part 4, 1847 | Tierney, Mark | Article in Journal | | 1993 |
| A short-title calendar of the papers of Archbishop Michael Slattery in Archbishop's House, Thurles. Part. 5 : 1848, Part 6: 1849-1852 | Tierney, Mark | Article in Journal | | 1994 |
| A short-title calendar of the papers of Archbishop Thomas William Croke in Archbishop's House, Thurles : 2, 1886-1890 | Tierney, Mark | Article in Journal | | 1973 |
| A short-title calendar of the papers of Archbishop Thomas William Croke in Archbishop's House, Thurles : part 1, 1841-1885 | Tierney, Mark | Article in Journal | | 1971 |
| A short-title calendar of the papers of Archbishop Thomas William Croke in Archbishop's House, Thurles. Pt. 1, 1841-85; pt. 2, 1886-1890; pt. 3, 1891-1902 | | Article in Journal | | 1974 |
| A short-title calender of the papers of Archbishop William Croke in Archbishop's House, Thurles, 2 : 1886-1890 | Tierney, Mark | Article in Journal | | 1974 |
| A short-title catalogue of the papers of Archbishop Michael Slattery in Archbishop's house, Thurles. Part 3, 1846 | Tierney, M. | Article in Journal | | 1991 |
| A sixteenth-century register of Achonry | Swords, Liam | Article in Journal | | 1998 |
| A slanderous bishop (R. Wye, bishop of Cloyne, 1376) | Butler, James | Article in Journal | | 1937 |
| A Spanish Franciscan archbishop of Dublin : Fr Matthew of Oviedo, O. F. M. | Barrett, Fergus | Article in Journal | | 1941 |
| A standard realised: the Ecclesiastical Commission churches of James Pain | O'Mahony, Bernard | Article in Journal | | 2010 |
| A statistical return of Armagh diocese in 1836 | O'Kane, Louis | Article in Journal | | 1958 |
| A stone in time : saving lost medieval memories of Irish stone monuments | Ní Ghrádaigh, Jenifer | Article in Book | | 2015 |
| A stoup at Kilchreest, Co. Clare | MacMahon, Michael | Article in Journal | | 1989 |
| A strange 'Púirín' in the early monastic site at Roscam, Co. Galway | Rynne, Etienne | Article in Book | | 2012 |
| A study of accommodation movements between Presbytery and Episcopacy in the seventeenth century in Scotland, England and Ireland | Hopkirk, D. S. | Thesis | | 1946 |
| A study of ecclesiastical appointments in the province of Tuam, 1399-1477 | Cosgrave, Ruth | Thesis | | 1968 |
| A study of the composition of the episcopate and episcopal activities in the ecclesiastical province of Cashel, c.1400-1431 | Kelleher, Donal Anthony | Thesis | | 1988 |
| A study of the history, landscape and architecture of the Carmelite Friary of Castlelyons, Co. Cork | Lafaye, Anne-Julie | Article in Journal | | 2019 |
| A suggested origin for the figure representations on the Derrynaflan paten | Ryan, Michael | Article in Book | | 1987 |
| A suggested typology for pre-Romanesque stone churches in Ireland | Manning, Conleth | Article in Book | | 2009 |
| A summary of the archaeology of Ulster, 2 | Davies, Oliver | Article in Journal | | 1949 |
| A survey of Romanesque vaulting in Great Britain and Ireland | Hoey, Lawrence R. ; Thurlby, Malcolm | Article in Journal | | 2004 |
| A survey of the ancient churches in the county of Limerick | Westropp, Thomas Johnston | Article in Journal | | 1904 |
| A survey of the ancient things in Lady's Island district | Leighim, Mac | Article in Journal | | 1920 |
| A survey of the provenance and survival of ecclesiastical objects in Ireland from the later medieval period | Smith, Keith | Thesis | | 2013 |
| A tale of two bishops | Farry, Michael | Article in Journal | | 1991 |
| A tale of two cathedrals | Fryday, Barbara | Monograph or Collective Volume | [The author] | 1980 |
| A tale of two cathedrals Aghadoe and Ardfert. 12th-century religious reform | O'Donoghue/Ross, Elizabeth | Article in Journal | | 2014 |
| A tale of two churches : St Marck's Church, Parish of Ballymacash. | Kelly, Brian | Monograph or Collective Volume | [Parish of Ballymacash] | 1991 |
| A tale of two crosiers | Ó Floinn, Raghnall | Article in Book | | 2011 |
| A third Romanesque font from county Wexford. [The author] speculates about another unusual ecclesiastical artifact | O'Brien, Keith | Article in Journal | | 2015 |
| A thousand years of church heritage in east Galway | Harbison, Peter | Monograph or Collective Volume | Ashfield | 2005 |
| A time of change and consolidation - Ferns in the nineteenth century | Morris, Fintan | Article in Book | | 1999 |
| A tour of the old St. Michael's Church, Dun Laoghaire | Clarke, Carl | Article in Journal | | 2009 |
| A treasury of churches. North Cork churches of James Pain | Power, Bill | Article in Journal | | 2004 |
| A trip through the history of Dalkey Island | Curran, Peadar | Article in Journal | | 2023 |
| A troubled see : memoirs of a Derry bishop | Daly, Edward | Monograph or Collective Volume | Four Courts | 2011 |
| A twelfth-century indulgence granted by an Irish bishop at Bath priory | Flanagan, Marie-Therese | Article in Book | | 2011 |
| A visual window on the church's past : the RCBL's architectural drawings digitising project | O'Neill, Michael | Article in Journal | | 2014 |
| A walking tour of Dublin churches | Anonymous | Monograph or Collective Volume | Veritas | 1988 |
| A walking tour of Dublin churches | Martin, Liam C. | Monograph or Collective Volume | Veritas | 1988 |
| A window (and door) into medieval Dublin. Excavation and display of medieval architectural remains under a supermarket floor in Aungier Street | Wigboldus,Leanne | Article in Journal | | 2022 |
| A wooden key to open Heaven's door : lessons in practical Catholicism from St Anthony's College, Louvain | Ryan, Salvador | Article in Book | | 2009 |
| Abandoned churches of Ireland | Blake, Tarquin | Monograph or Collective Volume | Collins Press | 2015 |
| Abbatial contention in Armagh in the eighth and ninth centuries : the 'Comarbada Patraic' as a source | Haggart, Craig | Article in Journal | | 2003 |
| Abbesses, minor dynasties and kings in clericatu : perspectives of Ireland, 700-850 | Bhreathnach, Edel | Article in Book | | 2001 |
| Abbeymahon and Kilmahon, two graveyards in Skibbereen | Casey, William | Article in Journal | | 2015 |
| About Killead and Gartree | | Monograph or Collective Volume | [The author] | 2003 |
| Abraham Brownrigg. Carlovian and eminent churchman | Murphy, Rory | Article in Journal | | 1996 |
| Absolutions and acts of disobedience : excommunication and society in fourteenth-century Armagh | Gundacker, Jay | Article in Journal | | 2009 |
| Accessions to repositories 1994 | Anonymous | Article in Journal | | 1996 |
| Accessions to repositories 1995 | Anonymous | Article in Journal | | 1997 |
| Accommodating clergymen : Church of Ireland ministers and their houses in the north of Ireland, c. 1600-1870 | Roulston, William J. | Article in Book | | 2006 |
| Accommodations with changing orders : the Church of Ireland, 1685-92 | Barnard, T. C. (Toby Christopher) | Article in Book | Four Courts Press | 2025 |
| Achonry and its churches: from the sixth century to the third millenium | Swords, Liam | Monograph or Collective Volume | Éditions du signe | 2007 |
| Acton Parish Church, Poyntzpass | Best, Barbara | Article in Journal | | 2000 |
| Actors and angels in the Architecture: Medieval men in feathered suits at Sligo Abbey and elsewhere in Ireland | Higgins, Jim | Article in Journal | | 2020 |
| Acts of Archbishop Colton in his metropolitan visitation of the diocese of Derry, A.D. MCCCXCVII, with a rental of the see estates at that time | | Monograph or Collective Volume | | 1850 |
| Adair through the ages | | Monograph or Collective Volume | | no date given |
| Adare Church | Jackson, Robert Wyse, Rev. | Monograph or Collective Volume | [Adare Parish] | [1970?] |
| Adare Franciscan friary | Conlan, Patrick, 1940- | Article in Journal | | 2012 |
| Address delivered at the jubilee year celebrations in St. Patrick's Church, Parteen - 31 December 1999 | Ó Riain, Donal | Article in Journal | | 2002 |
| Address delivered at the Opening of the Synod of Clogher, on Friday, September 27th,1895 | Stack, Charles Maurice | Monograph or Collective Volume | William Mc Gee | 1895 |
| Address of the bishop and clergy of Cloyne to the Queen, 1711 | | Article in Journal | | 1941 |
| Adelaide Memorical Church of Christ the Redeemer | McGregor, Eileen | Article in Journal | | 2005 |
| Adiutor laborantium : a poem by Adomnán? | Márkus, Gilbert | Article in Book | | 2010 |
| Adomnán among the bird-hunters : tradition and creativity in 'Beannachadh Seilg' | Low, Mary | Article in Book | | 2010 |
| Adomnán and Donegal | Lacey, Brian | Article in Book | | 2010 |
| Adomnán in medieval Gaelic literary tradition | Clancy, Thomas Owen | Article in Book | | 2010 |
| Adomnán of Iona : theologian, lawmaker, peacemaker | | Monograph or Collective Volume | Four Courts | 2010 |
| Adomnán's voyaging saint : the cult of Cormac ua Liatháin | Tipp, Dan,Wooding, Jonathan M., | Article in Book | | 2010 |
| Adomnán, two saints, and the paschal controversy | Márkus, Gilbert | Article in Journal | | 2017 |
| Adomnán’s Lex Innocentium and the laws of war | Houlihan, James W. | Monograph or Collective Volume | Four Courts Press Ltd | 2020 |
| Aerial ships and underwater monasteries : the evolution of a monastic marvel | Carey, John | Article in Journal | | 1992 |
| After the Vikings : Medieval archaeology of the Isle of Man, 1100-1550 | Davey, Peter | Monograph or Collective Volume | Manx National Heritage | 2013 |
| Afterword : the re-ordering of the Honan chapel | Ó Suilleabháin, Gearóid | Article in Book | | 2004 |
| Agha Church : architectural iconography and building ambiguities | Ní Ghrádaigh, Jenifer | Article in Book | | 2008 |
| Aghabog Church of Ireland survey 1824 | MacDonald, Brian | Article in Journal | | 1997 |
| Agherton Parish, Portstewart : a brief history | Thomas, Avril | Monograph or Collective Volume | Display Aids | 1996 |
| Aghowle church, Co. Wicklow | Corlett, Christiaan | Monograph or Collective Volume | Wordwell | 2011 |
| Ailbe Ua Maél Muaid, Uí Chennselaig and the Vitae Sanctorum Hiberniae | Mac Shamhráin, Ailbhe | Article in Book | | 2013 |
| Ainmneacha na nDioghaise in Éirinn, 1716 | Mac Fhinn, Pádraig Eric, 1895-1987 | Article in Journal | | 1954 |
| Airgialla churches and churches in Donegal | Silke, John J. | Article in Journal | | 1988 |
| Áitainmneacha na Gaillimhe | Ó Máille, Tomás S. | Article in Book | | 1984 |
| Albrecht Suerbeer, archbishop of Armagh | Conlan, Patrick, 1940- | Article in Journal | | 2004 |
| Alien priories in medieval Ireland : history and archaeology | Stout, Geraldine | Article in Book | | 2024 |
| All Saints Church, Clooney 1867-1967 : centenary news | Anonymous | Monograph or Collective Volume | [All Saints Church, Clooney]|[Printed by A. Emery] | 1967 |
| All Saints Church, Killasser, 1868-2018 : a parish and its people | | Monograph or Collective Volume | Killasser & Callow Heritage Society | 2018 |
| All Saints Church, Mullingar: notes concerning the history of the church since 1814 | Winckworth, Trevor E. | Monograph or Collective Volume | [All Saints Church] | 1989 |
| All Saints' Church, Blackrock, County Dublin | Howley, James | Article in Journal | | 2010 |
| All Saints, Cootehill, 1819-2019 : a history of the church, the parish and its people | Smyth, Jonathan A. | Monograph or Collective Volume | Cumann Seanchais Bhreifne | 2019 |
| All Saints, Drimoleague, and Catholic visual culture under Bishop Cornelius Lucey in Cork, 1952-9 | Butler, Richard J. | Article in Journal | | 2015 |
| All were together, seemingly conspiring | Matthiesen, Leroy T. | Article in Journal | | 2005 |
| Altars in Ireland, 1050-1200 : a survey | Murray, Griffin | Article in Journal | | 2010 |
| Alternative establishments? Insular Catholicism and Presbyterianism | Armstrong, RobertÓ hAnnracháin, Tadhg | Article in Book | | 2013 |
| Altinure Church | Donnelly, Philip | Article in Journal | | 2002 |
| An 18th century episcopal instruction for Ossory | Costello, Con | Article in Journal | | 1983 |
| An account of the history of Ferns Cathedral Church | McFall, T. C. H. | Monograph or Collective Volume | A. P. C. K. | 1954 |
| An age of modernization, 1598-1690 | Gillespie, Raymond | Article in Book | | 2009 |
| An alternative establishment : the evolution of the Irish Catholic hierarchy, 1600-49 | Ó hAnnracháin, Tadhg | Article in Book | | 2013 |
| An ancient chest in St Patrick's Cathedral, Dublin | O'Farrell, Fergus | Article in Book | | 1998 |
| An ancient Irish parish : past and present, being the parish of Donaghmore, County Down | Cowan, J. Davidson | Monograph or Collective Volume | David Nutt | 1914 |
| An appeal of the Ulster Franciscans against Blessed Oliver Plunket | Jennings, Brendan | Article in Journal | | 1956 |
| An archaeological assessment of Kilmore Old Cathedral, County Cavan | Giacometti, Antoine ; Cronin, John J. ; Hughes, Sam | Article in Book | Cumann Seanchais Bhreifne | 2025 |
| An archaeological survey at the Church of Kildemock, Millockstown, County Louth | Brady, Conor | Article in Journal | | 2016 |
| An archaeological survey of early medieval settlement in the parish of Mullagh, County Cavan: reconstructing an early medieval rural landscape | Farrelly, Johann | Article in Journal | | 2014 |
| An archaeological survey of St. Audoen's church, Cornmarket | Crawford, John, 1953-2011 | Article in Journal | | 1996 |
| An architectural history of Boyle Abbey and its cloistral buildings | Stalley, Roger | Article in Book | | 2022 |
| An architectural history of Christ Church Cathedral Dublin c.1540-1870 | Kinsella, Stuart | Thesis | | 2009 |
| An architectural history of the Church of Ireland | O'Neill, Michael | Monograph or Collective Volume | Church of Ireland Publishing | 2022 |
| An article on the foundation and endowment of the Church of Trim, 432 A.D. | Athey, Rowland | Article in Journal | | 1955 |
| An Augustinian Provincial Chapter at Fatherd, 1649 | Fenning, Hugh | Article in Journal | | 2006 |
| An Cairdinéal Tomás Ó Fiaich agus comhthéacs an chreidimh in Éirinn | Ó Maolfabhail, Donncha | Article in Journal | | 1992 |
| An eaglais agus filí na scol | Simms, Katharine | Article in Book | | 1994 |
| An early Christian ecclesiastical site at Carrowrevagh, near Carrowkennedy, county Mayo | Corlett, Christiaan | Article in Journal | | 1997 |
| An early Christian hoard from Derrynaflan, Co. Tipperary | Ryan, Michael | Article in Journal | | 1980 |
| An early ecclesiastical site investigated at Drumgath, Co. Down | Craig, DavidDickson, BarbaraWelsh, Harry | Article in Journal | | 2016 |
| An early list of county Donegal parishes | Ó Gallachair, Pádraig | Article in Journal | | 1974 |
| An early medieval church site at Kilbree Upper, Sheeaune, Westport, Co. Mayo | Irwin, Marian | Article in Journal | | 1998 |
| An ecclesiastical trial. An examination of the trial, in 1776, of the Rev. Edward Smyth, curate of Ballyculter parish | Kennedy, W. E. | Article in Journal | | 1989 |
| An edition, with introduction and notes, of the register of Archbishop Mey; and a calendar of the register of Archbishop Prene | Quigley, W.G.H.Roberts, E.F.D. | Thesis | | 1955 |
| An eighteenth-century antiquary : the sketches, notes and diaries of Austin Cooper, 1759-1830 | | Monograph or Collective Volume | Falconer | 1942 |
| An enduring monument | Unkel, Jill | Article in Journal | | 2005 |
| An English bishop afloat in an Irish see : John Bale, bishop of Ossory, 1552-3 | Tong, Stephen | Article in Journal | | 2018 |
| An enquiry respecting the history of three of the ancient parish churches of Kilkenny known as St. Patrick's, St. Maul's, and St. Rock's, with some notes on the origin of the word "Gillapadraig", assumed as a patronymic by the kings of Ossory in the 10th century | Hogan, John | Article in Journal | | 1883 |
| An Examination of the Church and Mauloleum, Kilmeane, Co. Roscommon | Lough, SeamusMacklin, JohnSweetman, P. DavidTimoney, Martin A | Article in Book | | 2023 |
| An example of the Gothic style in Ireland | Dunne, Mildred | Article in Book | | 1998 |
| An extract from Bishop David Moriarty's diary, 1856 | O'Shea, Kieran | Article in Journal | | 1984 |
| An fhéile i scéalta cráifeacha an bhéaloidis | Ó Héalaí, Pádraig | Article in Book | | 2000 |
| An historical overview of the period | Milne, Kenneth | Article in Book | | 2019 |
| An incident between the French Canadians and the Irish in the Diocese of Maine in 1906 | Woodbury, Kenneth B. | Article in Journal | | 1967 |
| An index to the Rev. William Carrigan's The history and antiquities of the diocese of Ossory : compiled by Helen Litton in association with the Canon Carrigan Centenary Committee of the Diocese of Ossory | | Monograph or Collective Volume | Diocese of Ossory | 2005 |
| An insular tradition of ecclesiastical law : fifth to eighth century | Flechner, Roy | Article in Book | | 2009 |
| An interesting plaque at Dysert Parish Church | Breen, Martin | Article in Journal | | 2018 |
| An introduction to Irish high crosses | Richardson, HilaryScarry, John | Monograph or Collective Volume | Mercier Press | 1990 |
| An introduction to the architectural heritage of Cork City | National Inventory of Architectural Heritage | Monograph or Collective Volume | Ireland. An Roinn Ealaíon, Oidreachta agus Gaeltachta = Dept. of Arts, Heritage, and the Gaeltacht. National Inventory of Architectural Heritage | 2012 |
| An introduction to the architectural heritage of County Carlow. Réamhrá ar oidhreacht ailtireachta Chontae Cheratharlaigh | National Inventory of Architectural Heritage | Monograph or Collective Volume | Dúchas The Heritage Service.|Ireland. Dept of the Environment, Heritage and Local Government | 2003 |
| An introduction to the architectural heritage of County Cavan | National Inventory of Architectural Heritage | Monograph or Collective Volume | National Inventory of Architectural Heritage | 2014 |
| An introduction to the architectural heritage of County Clare | National Inventory of Architectural Heritage | Monograph or Collective Volume | Ireland. Dept of the Environment, Heritage and Local Government. National Inventory of Architectural Heritage | 2009 |
| An introduction to the architectural heritage of County Donegal | National Inventory of Architectural Heritage | Monograph or Collective Volume | Ireland. Dept of the Environment, Heritage and Local Government. National Inventory of Architectural Heritage | 2014 |
| An introduction to the architectural heritage of County Galway | National Inventory of Architectural Heritage | Monograph or Collective Volume | Stationery Office for National Inventory of Architectural Heritage | 2011 |
| An introduction to the architectural heritage of County Kerry. Réamhrá ar oidhreacht ailtireachta Chontae Chiarraí | National Inventory of Architectural Heritage | Monograph or Collective Volume | Dúchas The Heritage Service.|Ireland. Dept of the Environment, Heritage and Local Governmen | 2003 |
| An introduction to the architectural heritage of County Kildare. Réamhrá ar oidhreacht ailtireachta Chontae Chill Dara | National Inventory of Architectural Heritage | Monograph or Collective Volume | Dúchas The Heritage Service.|Ireland. Dept of the Environment, Heritage and Local Governmen | 2003 |
| An introduction to the architectural heritage of County Kilkenny | Ireland. Department of the Environment, Heritage and Local GovernmentNational Inventory of Architectural Heritage | Monograph or Collective Volume | The Stationery Office for Dept. of the Environment, Heritage and Local Government, National Inventory of Architectural Heritage; Dúchas, The Heritage Service | 2006 |
| An introduction to the architectural heritage of County Laois. Réamhrá ar oidhreacht ailtireachta Chontae Laoise | National Inventory of Architectural Heritage | Monograph or Collective Volume | Dúchas The Heritage Service.|Ireland. Dept of the Environment, Heritage and Local Governmen | 2003 |
| An introduction to the architectural heritage of County Leitrim | National Inventory of Architectural Heritage | Monograph or Collective Volume | Dept. of the Environment and Local Government, National Inventory of Architectural Heritage; Dúchas, The Heritage Service | 2004 |
| An introduction to the architectural heritage of County Longford | National Inventory of Architectural Heritage | Monograph or Collective Volume | National Inventory of Architectural Heritage | 2010 |
| An introduction to the architectural heritage of County Louth | National Inventory of Architectural Heritage | Monograph or Collective Volume | Stationery Office for Dept. of the Environment and Local Government, National Inventory of Architectural Heritage; Dúchas, The Heritage Service | 2008 |
| An introduction to the architectural heritage of County Mayo | National Inventory of Architectural Heritage | Monograph or Collective Volume | Ireland. Dept of the Environment, Heritage and Local Government. National Inventory of Architectural Heritage | 2013 |
| An introduction to the architectural heritage of County Meath. Réamhrá ar oidhreacht ailtireachta Chontae na Mí | National Inventory of Architectural Heritage | Monograph or Collective Volume | Dúchas The Heritage Service.|Ireland. Dept of the Environment, Heritage and Local Governmen | 2003 |
| An introduction to the architectural heritage of County Monaghan | National Inventory of Architectural Heritage | Monograph or Collective Volume | Ireland. Dept of the Environment, Heritage and Local Government. National Inventory of Architectural Heritage | 2013 |
| An introduction to the architectural heritage of County Offaly | Ireland. Department of the Environment, Heritage and Local GovernmentNational Inventory of Architectural Heritage | Monograph or Collective Volume | The Stationery Office for Dept. of the Environment, Heritage and Local Government, National Inventory of Architectural Heritage; Dúchas, The Heritage Service | 2006 |
| An introduction to the architectural heritage of County Roscommon | National Inventory of Architectural Heritage | Monograph or Collective Volume | Dept. of the Environment and Local Government, National Inventory of Architectural Heritage; Dúchas, The Heritage Service | 2004 |
| An introduction to the architectural heritage of County Sligo | National Inventory of Architectural Heritage | Monograph or Collective Volume | Dúchas The Heritage Service.|Ireland. Dept of the Environment, Heritage and Local Government | 2007 |
| An introduction to the architectural heritage of County Waterford | Dúchas The Heritage Service.Ireland. Dept of the Environment, Heritage and Local GovernmentNational Inventory of Architectural Heritage | Monograph or Collective Volume | National Inventory of Architectural Heritage | 2004 |
| An introduction to the architectural heritage of County Westmeath | National Inventory of Architectural Heritage | Monograph or Collective Volume | Department of Environment, Heritage and Local Government: National Inventory or Architectural Heritage | 2007 |
| An introduction to the architectural heritage of County Wexford | National Inventory of Architectural Heritage | Monograph or Collective Volume | National Inventory of Architectural Heritage | 2010 |
| An introduction to the architectural heritage of County Wicklow | National Inventory of Architectural Heritage | Monograph or Collective Volume | Dúchas The Heritage Service.|Ireland. Dept of the Environment, Heritage and Local Governmen | 2004 |
| An introduction to the architectural heritage of Dublin north city | Kelly, Merlo | Monograph or Collective Volume | An Roinn Ealaíon, Oidhreachta agus Gaeltachta. Department of Arts, Heritage and the Gaeltacht | 2015 |
| An introduction to the architectural heritage of East Cork | National Inventory of Architectural Heritage | Monograph or Collective Volume | Ireland. Dept of the Environment, Heritage and Local Government. National Inventory of Architectural Heritage | 2009 |
| An introduction to the architectural heritage of Fingal. Réamhrá ar oidhreacht ailtireachta Fhine Gall | National Inventory of Architectural Heritage | Monograph or Collective Volume | Dúchas The Heritage Service.|Ireland. Dept of the Environment, Heritage and Local Governmen | 2003 |
| An introduction to the architectural heritage of Limerick City | National Inventory of Architectural Heritage | Monograph or Collective Volume | Dúchas The Heritage Service.|Ireland. Dept of the Environment, Heritage and Local Governmen | 2008 |
| An introduction to the architectural heritage of North Cork | National Inventory of Architectural Heritage | Monograph or Collective Volume | Ireland. Dept of the Environment, Heritage and Local Government. National Inventory of Architectural Heritage | 2009 |
| An introduction to the architectural heritage of North Tipperary | National Inventory of Architectural Heritage | Monograph or Collective Volume | Dúchas The Heritage Service.|Ireland. Dept of the Environment, Heritage and Local Governmen | 2006 |
| An introduction to the architectural heritage of South Dublin County; Réamhrá ar oidhreacht ailtireachta Chontae Bhaile Átha Cliath Theas | National Inventory of Architectural Heritage | Monograph or Collective Volume | Ireland. Dept of the Environment, Heritage and Local Government. National Inventory of Architectural Heritage. Dúchas, the Heritage Service | 2003 |
| An introduction to the architectural heritage of South Tipperary | National Inventory of Architectural Heritage | Monograph or Collective Volume | National Inventory of Architectural Heritage | 2007 |
| An introduction to the architectural heritage of West Cork | National Inventory of Architectural Heritage | Monograph or Collective Volume | Ireland. Dept of the Environment, Heritage and Local Government. National Inventory of Architectural Heritage | 2011 |
| An introduction to the geometry used in the layout of Clonfert portal | Cunniffe, Christy | Article in Book | | 2012 |
| An introduction to Ulster architecture | Dixon, Hugh | Monograph or Collective Volume | | 1975 |
| An investigation of the material culture of Donegal Franciscan friaries in the late sixteenth and seventeenth centuries | Smith, Kevin | Article in Journal | | 2011 |
| An Irish apostle : articulating and actualising apostolicity in the early Irish church | Lordan, Shane | Thesis | | 2012 |
| An Irish bishop in penal times : the chequered career of Sylvester Lloyd, OFM, 1680-1747 | Fagan, Patrick, 1922-2011 | Monograph or Collective Volume | Four Courts | 1993 |
| An Irish counter-reformation bishop : John Roche | Corish, Patrick J. | Article in Journal | | 1959 |
| An Irish genealogical source : a guide to church records | | Monograph or Collective Volume | Ulster Historical Foundation | 1994 |
| An Irish seventeenth-century translation of the rule of St. Clare | | Article in Journal | | 1948 |
| An old Armagh See rental | Love, H. W. | Article in Journal | | 1965 |
| An old Dublin vestry book | Leslie, J. B. (James Blennerhassett) | Article in Journal | | 1943 |
| An old Irish silver chalice | Gumley, E.M. | Article in Journal | | 1932 |
| An Old-Irish metrical rule | | Article in Journal | | 1904 |
| An ornament to the city : Holy Trinity Church & the Capuchin Order | Curtin-Kelly, Patricia | Monograph or Collective Volume | History Press Ireland | 2015 |
| An tArdeaspag Mac hÉil agus an Cairdinéal Ó Cuilinn | Ó Báin, Liam | Article in Book | | 1983 |
| An tAthair Mícheál Ó Gríofa | Ó Comhraí, Cormac | Article in Book | | 2008 |
| An tEasbog Tomás Mhac Comhain (1831-1847) | Mac Fhinn, Pádraig Eric, 1895-1987 | Article in Journal | | 1946 |
| An tEasbog Tomás Ó Coisdealbha, 1786-1831 | Mac Fhinn, Pádraig Eric, 1895-1987 | Article in Journal | | 1945 |
| An Ulster parish : being a history of Donaghcloney (Waringstown) | Atkinson, Edward Dupré | Monograph or Collective Volume | Hodges, Figgis | 1898 |
| An unnoticed constructional feature in insular church and castle building | Rynne, Etienne | Article in Book | | 1982 |
| An unpublished letter of St Oliver Plunkett | | Article in Journal | | 1975 |
| An unrecorded ecclesiastical enclosure at Ballyallaban, Co. Clare | Moore, FionnbarrSheehan, John | Article in Journal | | 1981 |
| Ancient altar-plate and other furnishings of the church of Armagh | Millett, Benignus | Article in Journal | | 1958 |
| Ancient and present state of the county and city of Waterford : containing a natural, civil, ecclesiastical, historical and topographical description thereof | Smith, Charles | Monograph or Collective Volume | Waterford County Council in association with Waterford City Council | 1746 |
| Ancient chalices of Killaloe diocese | Gleeson, Dermot F. | Article in Journal | | 1939 |
| Ancient churches in east Waterford : Crook | O'Meara, Jim | Article in Journal | | 1976 |
| Ancient connections : archaeological investigations at St Mary's Abbey, Ferns, Co. Wexford | Shine, Denis ; Diana, Annamaria ; Mandal, Stephen ; O'Meara, Daniel | Article in Book | | 2024 |
| Ancient crosses in Barony of Ballaghkeen | Ranson, Joseph | Article in Journal | | 1948 |
| Ancient Irish architecture : a monograph of Cormac's Chapel, Cashel, Co. Tipperary | Hill, Arthur | Monograph or Collective Volume | [s.n.] | 1874 |
| Ancient Irish architecture, Ardfert cathedral, Co. Kerry | Hill, Arthur | Monograph or Collective Volume | [s.n.] | 1870 |
| And curiously enough... Discovering the quirkier side of Westmeath... | Sharkey, Olive | Article in Journal | | 2017 |
| Anglican church architecture in seventeenth-century Offaly | Lyttleton, James | Article in Journal | | 2008 |
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| Anglican Ireland : a brief history and explanation of the Church of Ireland to mark the meeting of Anglican primates of Ireland, 1991 | Gibson-Harries, Elizabeth | Monograph or Collective Volume | [s.n.] | 1991 |
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| Anglo-Irish church life : fourteenth and fifteenth centuries | Gwynn, Aubrey | Monograph or Collective Volume | Gill | 1968 |
| Anglo-Norman castles and religious foundations in Counties Louth and Down : a comparison with examples in England and Wales | Lennon, Alison | Thesis | | 2008 |
| Anglo-Norman Parish Churches: Origins, Contexts and Patronage | Empey, Adrian | Article in Book | | 2021 |
| Anglo-Norman remains at Rathmore, Athboy | Rheinisch, Siobhán | Article in Journal | | 2014 |
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| Anti-Catholicism in Britain and Ireland, 1600-2000 : practices, representations and ideas | | Monograph or Collective Volume | Palgrave Macmillan | 2020 |
| Anti-tithe affrays in the parishes of Magheracloone and Donaghmoyne in 1832 | Gilmore, Brian | Article in Journal | | 2019 |
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| Antiquities Cornu-Brittanick: language, memory and landscape in early modern Cornwall | Walsham, Alexandra | Article in Book | | 2014 |
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| Antiquities of the Parish of Kilmacow | Brennan, D, P.P. | Article in Journal | | 1879 |
| Antrim Bell-shrine | Williams, Brian | Article in Journal | | 2003 |
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| Appropriating the past : Romanesque Spolia in Seventeenth-Century Ireland | Moss, Rachel | Article in Journal | | 2008 |
| Archaeological and historical monuments in Ballynaglogh, Ballymote, Co,. Sligo | Doherty, Fiona | Article in Journal | | 2018 |
| Archaeological excavation of the medieval church of St John of Bothe Street, Fishamble Street, Dublin 8 | Simpson, Linzi | Article in Book | | 2019 |
| Archaeological excavations at Lorrha, Co. Tipperary | Bolger, TeresaMoloney, ColmTroy, C. | Article in Journal | | 2012 |
| Archaeological excavations at the Magdalene Tower, Drogheda, County Louth | Murphy, Donald | Article in Journal | | 1997 |
| Archaeological excavations on Mount Gamble Hill : evidence for a new early medieval church in Swords? | O'Donovan, Edmond | Article in Book | | 2016 |
| Archaeological excavations on Mount Gamble Hill : stories from the first Christians in Swords | Geber, Jonny,O'Donovan, Edmond, | Article in Book | | 2009 |
| Archaeological Inventory of County Louth | Buckley, Victor M. | Monograph or Collective Volume | Stationery Office | 1986 |
| Archaeological inventory of County Wexford | | Monograph or Collective Volume | The Stationery Office | 1996 |
| Archaeological Survey of County Donegal : a description of the field antiquities of the county from the Mesolithic Period to the 17th century A.D. | Lacy, Brian | Monograph or Collective Volume | Donegal County Council | 1983 |
| Archaeology and early church organisation on Iveragh and Dingle, Ireland | O'Carragain, Tomas | Article in Book | | 2003 |
| Archaeology of early medieval baptism at St Mullin's, Co. Carlow | Ó Carragáin, Tomás
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| Archaeology, topography and building fabric : the cathedral and town of medieval Kildare | Bradley, John, 1954-2014 | Article in Journal | | 2000 |
| Archbishop Carpenter and the Catholic revival, 1770-86 | Wall, Thomas | Article in Journal | | 1955 |
| Archbishop Charles Agar : churchmanship and politics in Ireland, 1760-1810 | Malcomson, A. P. W. | Monograph or Collective Volume | Four Courts | 2002 |
| Archbishop Crolly and the development of Catholicism in Ulster 1812-49 | Macaulay, Ambrose | Monograph or Collective Volume | St Mary's College | 1990 |
| Archbishop Daniel Mannix | Griffin, James | Article in Journal | | 1990 |
| Archbishop FitzRalph and the Friars | Gwynn, Aubrey | Article in Journal | | 1937 |
| Archbishop Fleming, patriot and scholar | Barrett, Fergus | Article in Journal | | 1941 |
| Archbishop Healy | McGreevy, Sean | Article in Journal | | 1946 |
| Archbishop Hugh MacMahon | Flynn, L. J. | Article in Journal | | 1973 |
| Archbishop James Butler II : catechist to generations at home and abroad | Wallace, Patrick, [Rev.] | Article in Book | | 1989 |
| Archbishop John Baptist Purcell | Forde, R. | Article in Journal | | 1988 |
| Archbishop John Bramhall and church lands in Athboy, 1641-1663 | McGrath, Bríd | Article in Journal | | 2017 |
| Archbishop John MacHale in Irish politics, 1830-50 | Clancy, Deirdre | Article in Journal | | 1958 |
| Archbishop John Thomas Troy (1739-1823) | Keogh, Dáire | Article in Journal | | 1995 |
| Archbishop King and Swift's appointment as dean of St Patrick's | Carpenter, Andrew | Article in Journal | | 1975 |
| Archbishop Leahy and faction fighting | O'Dwyer, Christopher | Article in Journal | | 1989 |
| Archbishop Leahy at the first Vatican Council | O'Neill, John | Article in Journal | | 1963 |
| Archbishop Leahy of Cashel (1806-75) | O'Dwyer, Christopher, Rev. | Thesis | | 1971 |
| Archbishop Malachy O'Quaelly, vicar apostolic of Killaloe, 1620-30; archbishop of Tuam, 1630-45 | Gleeson, Dermot F. | Article in Journal | | 1948 |
| Archbishop Miler Magrath : 1522-1622 the enigma of Cashel : essays in reformation history | Ryan, Patrick J. | Monograph or Collective Volume | Lisheen Publications | 2014 |
| Archbishop Murray, 1768-1852 | Ronan, Myles V. (Myles Vincent) | Article in Journal | | 1952 |
| Archbishop Richard Creagh of Armagh, 1525-1586 : an Irish prisoner of conscience of the Tudor era | Lennon, Colm | Monograph or Collective Volume | Four Courts | 2000 |
| Archbishop Troy (1739-1823) and revolution | Peel, Edmund J., Rev. | Thesis | | 1956 |
| Archbishop Ussher and English Presbyterianism | Knox, R. B. | Article in Journal | | 1964 |
| Archbishop Ussher and Father Brendan O'Conor | Gwynn, Aubrey | Article in Book | | 1957 |
| Archbishop Ussher's scheme of church government | Bolton, F. R. | Article in Journal | | 1947 |
| Archbishop Walsh | Leslie, John Randolph (Shane), 1885–1971 | Article in Book | | 1960 |
| Archbishop Walsh and the Commission on Manual and Practical Instruction | O'Donovan, Patrick F. | Article in Journal | | 1986 |
| Archbishop William Hayden (1868-1936) | Cassin, Maeve | Article in Journal | | 1994 |
| Archbishop William King (1650-1729) : church Tory and state whig? | Richardson, Joseph | Article in Journal | | 2000 |
| Archbishop's Bulkeley's visitation of Dublin, 1630 | | Article in Journal | | 1941 |
| Archbishops Edmund MacGauran and Malachy O'Queely : some circumstances of their deaths | Connellan, M. J. | Article in Journal | | 1948 |
| Archdiocese of Armagh : a history | Murray, Raymond | Monograph or Collective Volume | [s.n.] | 2000 |
| Archdiocese of Tuam : an illustrated history | | Monograph or Collective Volume | Booklink | 2005 |
| Architects of Ulster : W.J. Barre, 1830-1867 : a vigorous mind | Harron, Paul | Monograph or Collective Volume | Ulster Architectural Heritage Society | 2021 |
| Architects of Ulster : Young and Mackenzie, a transformational provincial practice 1850-1960 | Harron, Paul | Monograph or Collective Volume | Ulster Architectural Heritage Society | 2016 |
| Architectural change and the parish church in post-reformation Cork | Cotter, Eamonn | Article in Book | | 2006 |
| Architectural changes and the arts in the life of the Church of Ireland | Harron, Paul | Article in Book | | 2019 |
| Architectural history of the church of St James the Apostle, Durrus | Arnold, Paul | Article in Book | | 1992 |
| Architectural sculpture at Glendalough | Moss, Rachel | Article in Book | | 2011 |
| Architectural Sculpture in Friaries in the West of Ireland: Franciscan and Dominican Houses in the Connacht Burke Lordships | McDermott, Yvonne | Article in Book | | 2021 |
| Architecture | Devlin, Eoin | Article in Book | Oxford University Press | 2023 |
| Architecture and patronage in fifteenth-century Adare | Stalley, Roger | Article in Journal | | 2003 |
| Architecture and regular life in Holy Trinity cathedral, 1150-1350 | O'Keeffe, Tadhg | Article in Book | | 2000 |
| Architecture and sculpture in Ireland, 1150-1350 | Stalley, Roger | Monograph or Collective Volume | Gill & Macmillan | 1971 |
| Architecture from the Reformation to 1800 | O'Neill, Michael | Article in Book | | 2009 |
| Architecture in Britain and Ireland, 600-1500 | Archer, LucySmith, Edwin | Monograph or Collective Volume | Harvill | 1999 |
| Architecture of the past in Cork | Hill, Henry H. | Article in Journal | | 1939 |
| Archives of the archdiocese of Boston | Rahill, Peter J. | Article in Journal | | 1959 |
| Archives of the Catholic Church in Ireland | Sheehy, David C. | Article in Book | | 1991 |
| Archives of the see of Ossory : Right Rev. W. Pakenham Walsh, D.D., bishop of Ossory, Ferns, and Leighlin | Gilbert, J. T. (John Thomas), Sir, 1829-1898 | Article in Book | | 1885 |
| Archives report : Galway diocesan archives | Power, Jan | Article in Journal | | 1991 |
| Ardagh and Tristernagh | McNamee, James Joseph | Article in Journal | | 1943 |
| Ardagh in the sixteenth century : a chapter in diocesan history | McNamee, James | Article in Journal | | 1937 |
| Ardcarne | Tonra, H. | Article in Journal | | 1998 |
| Ardfert and Aghadoe Clergy and Parishes: being an account of the clergy of the Church of Ireland in the diocese of Ardfert and Aghadoe from the earliest period, with historical notes of the several parishes, churches, etc | | Monograph or Collective Volume | Originally The Church of Ireland Printing and Publishing Co. Ltd|Ulster Historical Foundation et al. | 2015 (originally 1940) |
| Ardfert Cathedral : summary of excavation results | Moore, Fionnbarr | Monograph or Collective Volume | Stationery Office | 2007 |
| Ardfert church 150 : a history of St. Brendan's church, Ardfert, Co. Kerry, 1855-2005 | O'Connor, Tommy | Monograph or Collective Volume | Foilseacháin Bréanainn | 2005 |
| Ardglass Methodist Church | Davey, Peter | Article in Journal | | 1997 |
| Ardmore Cathedral | Smith, J. T. | Article in Journal | | 1972 |
| Ardstraw (Newtownstewart) : historical survey of a parish, 1600-1900 | Gebbie John H. | Monograph or Collective Volume | Strule Press | 1968 |
| Arklow Methodist church | White, Dorothy | Article in Journal | | 1985 |
| Armagh and Rome in the seventh century | Sharpe, Richard | Article in Book | | 1984 |
| Armoy excavations adjusting your sites : the ecclesiastical enclosure at Armoy, Co. Antrim | Hurl, Declan | Article in Journal | | 1998 |
| Artane church, Kilmore Road, Dublin | McMahon, Mary | Article in Book | | 1998 |
| Arts and crafts and revivalism in Catholic Church decoration : a brief duration | Wilson, Ann | Article in Journal | | 2013 |
| Askeaton : the medieval town : a visitor's guide | Curtin, Gerard | Monograph or Collective Volume | Sliabh Luachra Historical Society | 2013 |
| Aspects of English Associations for the Beginnings of Romanesque Architecture in Munster | Thurlby, Malcolm | Article in Book | | 2021 |
| Aspects of the Breton transmission of the Hibernensis | Flechner, Roy | Article in Journal | | 2005 |
| Asser's Parochia of Exeter | Padel, O. J. | Article in Book | | 2011 |
| Attitudes to excommunication in the early insular Church : returning to Gildas’s letter to Finnian | Joyce, Stephen J. | Article in Journal | | 2020 |
| Aughrim Protestant Church and Graveyard | Moran, Alan | Article in Journal | | 2019 |
| Augustinian Canons in twelfth- and thirteenth-century Ireland : history, architecture and identity | O'Keeffe, Tadhg | Article in Book | | 2011 |
| Augustus Welby Northmore Pugin (1812-52) : a biographical portrait | Meldon, Jeanne | Article in Book | | 2012 |
| Australia : the influence of the Irish on the history of the church in Australia | Cosgrave, A. P. | Article in Journal | | 1947 |
| Balancing the concerns of church and state : the Archbishops of Dublin, 1181-1228 | Murphy, Margaret | Article in Book | | 1995 |
| Ballingarry, Granagh and Clouncagh, County Limerick : archival records, 1800-1900 | Kerins, Christopher | Monograph or Collective Volume | Christy Kerins | 2000 |
| Ballintubber Abbey, Carra, Co. Mayo | Murphy, Damian | Article in Journal | | 2020 |
| Ballintubber Abbey: notes on its history | Blake, Martin J. | Article in Journal | | 1903 |
| Ballintubber by reflection - A.D. 2000 | Brady, John | Article in Journal | | 2000 |
| Ballybeg priory. Parts 1-2 | Shine, Michael | Article in Journal | | 1994 |
| Ballyheigue : our Christian heritage | | Monograph or Collective Volume | | 2012 |
| Ballynacourty Church 1817-1963 : remembering the church that once stood in the heart of a west Kerry village and commemorating the lives of those buried there | Annascaul Tidy Towns Action Group | Monograph or Collective Volume | Annascaul Tidy Towns Action Group | 2017 |
| Ballynacourty Church, Co. Kerry, 1815-1963 and its parishioners | Jones, Laurence | Article in Journal | | 2017 |
| Baltinglass : abbey of the three rivers | Carville, Geraldine | Monograph or Collective Volume | | 1984 |
| Bangor Abbey through fourteen centuries | Hamilton, James | Monograph or Collective Volume | [Bangor Abbey] | 1958 |
| Baptisms of the first Presbyterian church of Newry, Co. Down, 1809-1822 | Ffolliott, Rosemary | Article in Journal | | 1979 |
| Barefaced effrontery : secular and ecclesiastical politics in early twelfth-century Ireland | Candon, Anthony | Article in Journal | | 1991 |
| Barndarrig : an ecclesiastical history from early times to 1947 | Murphy, Jim | Article in Journal | | 2000 |
| Barnycarroll, Co. Mayo. A chapel and 17th century holy water font | Guinan, Bernard | Article in Journal | | 2010 |
| Bastardy - the stain of illegitimacy in Medieval Ireland | Hickey, Cormac T. | Article in Journal | | 2020 |
| Bauforschung im Kreuzgang des ehemaligen Klosters St. Jakob | Schnieringer, Karl | Article in Book | | 2005 |
| Bective abbey, Co. Meath | Leask, H. G. (Harold G.) | Article in Journal | | 1916 |
| Bede and the Irish | Thacker, Alan T. | Article in Book | | 1996 |
| Bede, Iona and the Picts | Duncan, Archibald Alexander McBeth | Article in Book | | 1981 |
| Begging, charity and religion in pre-Famine Ireland | McCabe, Ciarán | Monograph or Collective Volume | Liverpool University Press | 2018 |
| Begley's diocese of Limerick | Irwin, Liam | Article in Journal | | 1994 |
| Behind animals, plants and interlace : Salin's style II on Christian objects | Wamers, Egon | Article in Book | | 2009 |
| Bejewelling Jerusalem: Architectural adornment and symbolic significance in the early Church in the Christian West | Boulton, Meg | Article in Book | | 2017 |
| Belach Conglais and the diocese of Cork, AD 1111 | Candon, Anthony | Article in Journal | | 1989 |
| Belfast Cathedral : the ornament | Thompson, Herbert Marshall | Monograph or Collective Volume | Belfast Cathedral Guild | 1927 |
| Belfast Cathedral: the decoration | Thompson, Herbert Marshall | Monograph or Collective Volume | Belfast Cathedral Guild | 1926 |
| Benedictine bishops in medieval Ireland | Varebeke, H. J. de | Article in Book | | 1967 |
| Berkeley's doctrine of the perceivable | Luce, A. A. | Article in Journal | | 1942 |
| Bethlehem, Athlone and Killinure : the Poor Clares and the Franciscans in the seventeenth century | Cunningham, Bernadette | Article in Book | | 2015 |
| Between reformation and enlightenment : Presbyterian clergy, religious liberty and intellectual change | Coffey, John | Article in Book | | 2013 |
| Between two rivers : Julianstown Union of Parishes | Nelson, Jim | Monograph or Collective Volume | Old Drogheda Society | 2002 |
| Bibliography of articles written by Rev. John Brady, diocesan historian, Co. Meath | | Article in Journal | | 1960 |
| Bicentenary of St Joseph's Church, Tinryland, Co. Carlow | Byrne, Maureen | Article in Journal | | 2020 |
| Birth of an airport parish : the early years of St Senan’s parish, Shannon, 1945-88 | Ó Donnabháin, Diarmaid | Monograph or Collective Volume | Columba Press | 2014 |
| Births, marriages and burials and other records of the Irish in America in and about the eighteenth century | O'Brien, Michael J. | Article in Journal | | 1913 |
| Bishop Barrett and King Richard III | O'Neill, Thomas Patrick | Article in Book | | 1991 |
| Bishop Bramhall's replies to queries raised by commissioners concerning the temporalities of Derry diocese | | Article in Journal | | 1943 |
| Bishop Cornelius Egan's diocesan reports to Rome | O'Shea, Kieran | Article in Journal | | 1979 |
| Bishop Dive Downes' visitation of his Diocese, 1699 | | Article in Journal | | 1909 |
| Bishop Dopping's visitation of the diocese of Meath 1693 | Loupès, Philippe | Article in Journal | | 1988 |
| Bishop Francis Hutchinson : his Irish publications and his library | Wheeler, Gordon | Article in Book | | 1996 |
| Bishop Francis Moylan | O'Farrell, Josephine | Thesis | | 1974 |
| Bishop George Montgomery’s Survey of the parishes of Derry diocese : a complete text from c.1609 | Jefferies, Henry A. | Article in Journal | | 1996 |
| Bishop J. Stock of Killala and Achonry - 1798-1810 | Coote-Duggan, John | Article in Journal | | 1983 |
| Bishop John Brenan, the intimate of Blessed Oliver | Power, P. | Article in Book | | 1937 |
| Bishop John Cantwell | Connell, Paul | Article in Book | | 2002 |
| Bishop John Keys O'Doherty 1889-1907 | Canning, B. J. (Bernard J.) | Article in Journal | | 2006 |
| Bishop John O'Molony : a great prelate of the penal days | G., J. S. | Article in Journal | | 1937 |
| Bishop John O'Molony of Killaloe (1617-1702) | Halpin, Sean | Article in Journal | | 1989 |
| Bishop Mant and the Down and Connor and Dromore Church Architecture Society : the influence of the Oxford and Evangelical movements, the Cambridge Camden Society and the Gothic Revival on the Church of Ireland and its architecture in Ulster 1838 - 1878 | McBride, Stephen Richard | Thesis | | |
| Bishop Mant's years in Killaloe, 1820-1823 | Kierse, Sean | Article in Journal | | 1982 |
| Bishop Michael Browne of Galway (1937-1976 and the regulation of public morality | Donnelly, James S., Jr | Article in Journal | | 2013 |
| Bishop Michael Browne of Galway and anti-communism, 1937-1976 | Madden, Gerard | Article in Journal | | 2014 |
| Bishop Montgomery's survey of the bishoprics of Derry, Raphoe and Clogher | | Article in Journal | | 1943 |
| Bishop of the land war : Dr Patrick Duggan, bishop of Clonfert, 1813-1896 | Anonymous | Monograph or Collective Volume | Veritas | 1987 |
| Bishop Patrick McGettigan of Raphoe, 1820-1861 | Canning, B. J. (Bernard J.) | Article in Journal | | 2011 |
| Bishop Pococke's improvements to St Canice's Cathedral, Kilkenny | Finnegan, Rachel | Article in Journal | | 2008 |
| Bishop Robert Walsh, the friars, and Edmund Ignatius Rice, 1817 | Fennessy, Ignatius | Article in Journal | | 1996 |
| Bishop Thomas Lewis O'Beirne and his church-building programme in the diocese of Meath, 1798-1823 | Gallagher, Mary C. | Thesis | | 2009 |
| Bishop Wheeler's Visitation of Ossory, 1622 | Ó Fearghail, Fearghus | Article in Journal | | 2015 |
| Bishop William Bedell and the ‘humble petition’ of the Protestant clergy and laity in Cavan, 1633 | Scott, Brendan | Article in Journal | | 2019 |
| Bishops and Benedictines : the case of Father Richard O'Halloran | Kollar, René | Article in Journal | | 1987 |
| Bishops as men of business and parliamentary managers in the Irish House of Lords, 1613-89 | Dennehy, Coleman A. | Article in Book | Four Courts Press | 2025 |
| Bishops in contention : secular and ecclesiastical politics in later sixteenth-century Clogher | Lennon, Colm | Article in Journal | | 2006 |
| Bishops in the early Irish church : a reassessment | Etchingham, Colmán | Article in Journal | | 1994 |
| Bishops of Ferns | De Vál, Seamus S. | Article in Book | | 1999 |
| Bishops of Ireland 1870-1987 | Canning, B. J. (Bernard J.) | Monograph or Collective Volume | Donegal Democrat | 1987 |
| Bishops, church and people : how Christian was 'early Christian Ireland'? | Etchingham, Colmán | Article in Book | | 2010 |
| Bishopstown House : an 18th century ecclesiastical estate at Bishopstown in county Cork | McCarthy, J. P. (James P.) | Monograph or Collective Volume | The author | 1976 |
| Blessed Nicholas Charnetskyi | McConvery, Brendan | Article in Book | | 2012 |
| Blessed Oliver Plunkett in Down and Connor | Smyth, J. | Article in Journal | | 1937 |
| Blessed Oliver Plunkett's report on the diocese of Armagh, 1670 | | Article in Journal | | 1959 |
| Blessed Thaddeus MacCarthy and diocese of Ross | Kiely, M. A. | Article in Journal | | 1936 |
| Blickling Homily III on the temptations in the desert | Wright, C. D. | Article in Journal | | 1988 |
| Bofeenaun Friary: history and architecture of a late medieval religious house | McDermott, Yvonne | Article in Journal | | 2018 |
| Boniface for the English | Stoclet, Alain J. | Article in Journal | | 2022 |
| Bonifaz und Virgil : Konflikt zweier Kulturen | Ó Néill, Pádraig | Article in Book | | 1985 |
| Boston Catholics : a history of the church and its people | O'Connor, Thomas H., 1922-2012 | Monograph or Collective Volume | Northeastern University Press | 1998 |
| Bow Lane and the medieval vicars choral of St Mary's Cathedral, Limerick | Hodkinson, Brian | Article in Journal | | 2010 |
| Boyle Abbey and the school of the west | Kalkreuter, Britta | Monograph or Collective Volume | Wordwell | 2001 |
| Boyle Abbey, County Roscommon : conservation, architecture and archaeological excavations 1982-2018 | NA | Monograph or Collective Volume | The Stationery Office | 2022 |
| Brenan, Carew, and their ecclesiastical histories | Ó Súilleabháin, Pádraig | Article in Journal | | 1964 |
| Bridgetown Priory : the Augustinian canons regular in medieval Ireland | O'Keeffe, Tadhg | Monograph or Collective Volume | Gandon | 1998 |
| Brief memoirs of all the Bishops of Derry since the Reformation : with a sketch of the early history of the See | Maturin, Edmund | Monograph or Collective Volume | James Hempton | 1867 |
| Brigit and Patrick in 'Vita Prima Sanctae Brigitae': veneration and jurisdiction | Dawson, Elizabeth | Article in Journal | | 2017 |
| British and Irish Religious Orders in Europe, 1560-1800 : conventuals, mendicants and monastics in motion | | Monograph or Collective Volume | Durham University. IMEMS Press | 2022 |
| British statesmen and the Irish church question | Shearman, H. F. | Article in Journal | | 1946 |
| Building 'God's own country' : The Reverend Rutherford Waddell, the global Irish and New Zealand history | Stenhouse, John | Article in Book | | 2015 |
| Building a church in nineteenth-century Ireland | Murphy, Ignatius | Article in Journal | | 1978 |
| Building a frontier? The architecture of the military orders in medieval Ireland | Grogan, PatO'Keeffe, Tadhg | Article in Book | | 2015 |
| Building opposition: the Mant controversy and the Church of Ireland in early Victorian Belfast | Farrell, Sean | Article in Journal | | 2014 |
| Building St. Patrick's Cathedral | McNierney, Patrick J. | Article in Journal | | 2004 |
| Building Victorian Dublin : Meade & Son and the expansion of the city | Galavan, Susan | Article in Book | | 2013 |
| Buildings and faith : church building from medieval to modern | Larmour, PaulMcBride, Stephen | Article in Book | | 2002 |
| Burials at the well: excavations at the Black Friary, Trim | Kelly, MarkSeaver, MatthewTravers, Ciara | Article in Book | | 2009 |
| Butler tombs and furnishings in St. Canices Cathedral, Kilkenny | Phelan, Margaret M. | Article in Journal | | 1982 |
| Buttevant Friary and its crypt | O'Keeffe, Tadhg | Article in Journal | | 2012 |
| Byways. A look at lesser used sources. (Roman Catholic marriage records) | Evans, Mihail D. | Article in Journal | | 1996 |
| Byways. A look at lesser used sources. [Church of Ireland registers] | Evans, Mihail D. | Article in Journal | | 1995 |
| Cáin Adomnáin, 697 : the Irish 'Geneva convention' | O'Dwyer, Máire | Article in Journal | | 2015 |
| Calary church and parish : diocese of Glendalough : 175th anniversary, 1834-2009 | Jennings, Robert | Monograph or Collective Volume | Calary Parish | 2009 |
| Calendar of ... Scritture riferite nei congressi, Irlanda, in Propaganda archives | | Article in Journal | | 1978 |
| Calendar of Archbishop Alen's register, c.1172-1534; prepared and edited from the original in the registry of the united dioceses of Dublin and Glendalough and Kildare | | Monograph or Collective Volume | | 1950 |
| Calendar of Bray papers | Meagher, Claude | Article in Journal | | 1970 |
| Calendar of documents contained in the chartulary commonly called Dignitas Decani of St Patrick's cathedral | | Article in Journal | | 1905 |
| Calendar of entries in the papal registers relating to Great Britain and Ireland : papal letters Vol. 17 : Alexander VI 1492-1503. Part 2, Vatican registers 1492-1503 with missing letters from other sources | | Monograph or Collective Volume | Irish Manuscripts Commission | 1998 |
| Calendar of entries in the papal registers relating to Great Britain and Ireland : papal letters Vol.18 : Pius III and Julius II. Vatican Registers (1503-1513); Lateran Registers (1503-1508) | | Monograph or Collective Volume | Stationery Office for Irish Manuscripts Commission | 1989 |
| Calendar of entries in the papal registers relating to Great Britain and Ireland : papal letters Vol.19 : 1503-1513. Lateran registers part 2 | | Monograph or Collective Volume | Irish Manuscripts Commission | 1998 |
| Calendar of entries in the papal registers relating to Great Britain and Ireland : Papal letters. Vol. 17. Part 1 : Alexander VI, 1492-1503 : Lateran registers | | Monograph or Collective Volume | Irish Manuscripts Commission | 1994 |
| Calendar of entries in the papal registers relating to Great Britain and Ireland : petitions to the pope. Vol. 1 : 1342-1419 | | Monograph or Collective Volume | | 1896 |
| Calendar of entries in the Papal Registers relating to Great Britain and Ireland, vols. I - XIII. Papal letters | | Monograph or Collective Volume | | 1893 |
| Calendar of entries in the papal registers relating to Great Britain and Ireland, papal letters, vol XX, 1513-1521 | NA | Monograph or Collective Volume | Irish Manuscripts Commission | 2005 |
| Calendar of entries in the papal registers relating to Great Britain and Ireland. Papal letters, vol. 16 ... Lateran registers, part 1 : 1492-1498 | | Monograph or Collective Volume | Stationery Office for the Irish Manuscripts Commission | 1986 |
| Calendar of entries in the Papal registers relating to Great Britain and Ireland. Vol. XVIII : Pius III and Julius II : Vatican registers (1503-1513); Lateran registers (1503-1508) | | Monograph or Collective Volume | The Stationery Office [for the Irish Manuscripts Commission] | 1989 |
| Calendar of Irish material in ... Fondo di Vienna in Propaganda archives | | Article in Journal | | 1990 |
| Calendar of leases and deeds of St. Patrick's cathedral, Dublin, 1660-89 | Leslie, J. B. | Article in Journal | | 1934 |
| Calendar of Papal letters relating to Great Britain and Ireland, vol. XXI, 1513-1521, Leo X, Lateran registers, part 2 | NA | Monograph or Collective Volume | Irish Manuscripts Commission | 2024 |
| Calendar of the letters of the Butler archbishops of Cashel (1750-92) | Donovan, Imelda | Thesis | | 1970 |
| Calendar of the papers of Dr Bray, archbishop of Cashel and Emly (1792-1820) | Meagher, Claude | Article in Journal | | 1968 |
| Calendar of volume 14 of the Fondo di Vienna in Propaganda Archives : part 3, ff. 284-395 | | Article in Journal | | 1990 |
| Calendar of volume 15 of the Fondo di Vienna in Propaganda archives | Millett, Benignus | Article in Journal | | 1991 |
| Calendar of volume 16 of the Fondo di Vienna in Propaganda archives : Part 1, ff 1-102 | Millett, Benignus | Article in Journal | | 1996 |
| Calendar of volume 16 of the Fondo di Vienna in Propaganda archives, part 2, ff 103-216 | Millett, Benignus | Article in Journal | | 1998 |
| Calendar to Christ church deeds, 1174-1684 | | Article in Book | | 1892 |
| Callan and Ormond : architecture of the 'Middle Nation'? | O'Donovan, Danielle | Article in Book | | 2012 |
| Calvinistic Methodism and the reformed tradition in eighteenth-century Wales | Jones, David Ceri | Article in Book | | 2014 |
| Canon E. Reussen's list of Irish Fransiscan theses in Louvain 1620-1738 | Fennessy, Ignatius | Article in Journal | | 2006 |
| Canon law and secular law in early Ireland : the significance of Bretha Nemed | Breatnach, Liam | Article in Journal | | 1984 |
| Canon law in Protestant lands | | Monograph or Collective Volume | | 1992 |
| Canonical faculties on the Irish mission in the reign of Queen Elizabeth, 1558-1603 | Jones, F. M. | Article in Journal | | 1953 |
| Canterbury and Armagh, 1443-1456 | Foss, D. B. | Article in Journal | | 1988 |
| Canterbury's perspective on church reform and Ireland 1070-1115 | Brett, Martin | Article in Book | | 2006 |
| Cardinal Basil Hume and Abbot Byrne | Smith, Sean | Article in Journal | | 2004 |
| Cardinal Bourne and Ireland | Gwynn, D. R. (Denis Rolleston), 1893-1972 | Article in Journal | | 1940 |
| Cardinal Cullen : biographical materials | Curran, M. J. | Article in Journal | | 1955 |
| Cardinal Cullen and Irish nationality | Steele, Edward David | Article in Journal | | 1975 |
| Cardinal Cullen and the system of national education in Ireland | Doyle, Joseph | Article in Book | | 2011 |
| Cardinal Cullen's other capital : Belfast and the 'devotional revolution' | Connolly, Sean J. | Article in Book | | 2011 |
| Cardinal Manning : a biography | Gray, Robert | Monograph or Collective Volume | [s.n.] | 1985 |
| Cardinal Patrick Francis Moran of Leighlinbridge, 1830-1911 | Ó Fearghail, Fearghus | Article in Book | | 2008 |
| Cardinal Patrick O'Donnell and Scotland | Canning, B. J. (Bernard J.) | Article in Journal | | 2001 |
| Cardinal Paul Cullen | Larkin, Emmet | Article in Book | | 1998 |
| Cardinal Paul Cullen and his world | | Monograph or Collective Volume | Four Courts | 2011 |
| Cardinal Samuel Stritch and his ancestors | MacMahon, Bryan | Article in Book | | 2012 |
| Carleton's ecclesiastical context : the Ulster Catholic experience | Rafferty, Oliver P. | Article in Journal | | 2000 |
| Carlingford churches in 1485 | Ross, Noel | Article in Journal | | 2011 |
| Carlisle Memorial Methodist Church (History in the News) | NA | Article in Journal | | 2025 |
| Carlow's old inns, churches, gaol, and castle | Douglas, M. C. | Article in Journal | | 1951 |
| Carnage in Wallstown. The Tithe War in North Cork in 1832 | Cronin, Neil | Article in Journal | | 2009 |
| Carved medieval font at Thomastown | MacGarry, Damian C. | Article in Journal | | 1980 |
| Cashel & Emly heritage | Skehan, Walter G. | Monograph or Collective Volume | Abbey Books | 1993 |
| Cashel and Germany : the documentary evidence | Ó Riain-Raedel, Dagmar | Article in Book | | 2006 |
| Cashel diocesan archives | Tierney, Mark | Article in Book | | 1989 |
| Cashel diocesan archives : a short survey of the papers preserved in Archbishop's House, Thurles | Tierney, Mark | Article in Journal | | 1967 |
| Cashel of the kings : a handy illustrated guide to the Rock of Cashel, its ruins and surroundings, | McCraith, L. M | Monograph or Collective Volume | The Chronicle (printer) | 1923 |
| Castledermot : its history and antiquities | Comerford, Michael, Coadjutor Bishop of Kildare and Leighlin | Article in Journal | | 1895 |
| Castledillon in the barony of South Salt | "Omurethi" | Article in Journal | | 1911 |
| Castledockrell church 1842-1992 | Anonymous | Monograph or Collective Volume | The church | 1992 |
| Castles of God : fortified religious buildings of the world | Harrison, Peter | Monograph or Collective Volume | Boydell Press | 2004 |
| Castles, churches and country houses : the lost architecture of county Fermanagh in an age of improvement, c.1700-c.1750 | Roulston, William J. | Article in Book | | 2004 |
| Cataldus Racha, a study in the early history of diocesan episcopacy in Ireland | Hennig, John | Article in Journal | | 1946 |
| Catalogue of Irish material in fourteen volumes of the Scritture originali riferite nelle congregazioni generali in Propaganda archives | | Article in Journal | | 1969 |
| Catalogue of manuscripts in possession of the Representative Church Body, ... Dublin | Leslie, J. B. (James Blennerhassett) | Monograph or Collective Volume | | 1938 |
| Catalogue of the papers of Dr Denis Conway (1722-96) in Limerick Diocesan Archives [with index] | Bracken, David | Article in Journal | | 2016 |
| Catalogue of the papers of Dr John Young, bishop of Limerick [1746-1813) held in the Limerick Diocesan Archives [with index] | Bracken, David | Article in Journal | | 2015 |
| Cathedral and mission | Cooney, Brendan | Article in Book | | 1998 |
| Cathedral and monastic office in Ireland | Curran, Michael | Article in Journal | | 1978 |
| Cathedral of St. Anne, Belfast, 1904-1930 | Thompson, Herbert Marshall | Monograph or Collective Volume | Belfast Cathedral Guild | 1930 |
| Cathedral quarter : a visitor's guide to its historic buildings | Harkin, Rita | Monograph or Collective Volume | Ulster Architectural Heritage Society | 2004 |
| Cathedral, close and community, c.1220 to c.1500 | Clarke, Howard B. | Article in Book | | 2009 |
| Cathedrals in Britain and Ireland : from early times to the reign of Henry VIII | Anderson, W.Hicks, C. | Monograph or Collective Volume | MacDonald and Jones | 1978 |
| Catholic church records | Ryan, James G. | Article in Book | | 1992 |
| Catholic clerical responses to the Restoration : the case of Nicholas French | McHugh, Jason | Article in Book | | 2008 |
| Catholic Devotion in Victorian Scotland | Aspinwall, Bernard | Article in Book | | 2008 |
| Catholic Dublin : the public expression in the age of Paul Cullen | Daly, Mary E. | Article in Book | | 2011 |
| Catholic emancipation : documents | Doherty, Gillian M.,O'Riordan, Tomás | Article in Book | | 2011 |
| Catholic religious practices and payments in seventeenth-century Ireland | Gillespie, Raymond | Article in Journal | | 1993 |
| Catholic revival in Kilmore diocese, 1603-41 | Mac Cuarta, Brian | Article in Book | | 2009 |
| Catholic University Church | O'Carroll, Ciarán | Article in Book | | 2012 |
| Catholicism in the province of Armagh, 1603-1641 | Mac Cuarta, Brian | Thesis | | 2004 |
| Catholics and protestants in an eighteenth-century Limerick parish : Ardcanny, 1659-1798 | Fleming, David A. | Article in Book | Four Courts Press | 2024 |
| Celbridge : some notes on its past history | Graham, Charles I. | Article in Journal | | 1899 |
| Celebrating 200 years of St Colman's Church, Cloyne | Hartnett, MargaretLyons, PatriciaTerry, Kevin | Monograph or Collective Volume | Cloyne Parish | 2015 |
| Celebrating 400 years, 1596-1996 : All Saint's Parish Church, Antrim | Gates, Peter,Kidd, Mervyn,Wallace, John | Monograph or Collective Volume | Antrim Printers | 1996 |
| Célí Dé : spiritual reform in Ireland, 750-900 | O'Dwyer, Peter | Monograph or Collective Volume | | 1981 |
| Celtic revivalist | Harbison, Peter | Article in Journal | | 2014 |
| Cemetery settlements and local churches in pre-Viking Ireland in light of comparisons with England and Wales | Ó Carragáin, Tomás | Article in Journal | | 2009 |
| Cemetery settlements and local churches in pre-Viking Ireland in light of comparisons with England and Wales | Ó Carragáin, Tomás | Article in Book | | 2009 |
| Centenary (St. Patrick's Church, Cullyhanna) | McMahon, Kevin | Article in Journal | | 1992 |
| Centenary of Heynstown Parish Church 1827-1927 | Dudley-Janns, F. P. | Monograph or Collective Volume | W. Tempest | 1927 |
| Centenary of St. Donard's of Murlough Parish Church of Dundrum - a short history | McCammon, Kenneth A. | Monograph or Collective Volume | Down Recorder [Printer] | 1987 |
| Centenary souvenir, 1840-1940 | St. John's Church Parish | Monograph or Collective Volume | St. John's Church parish | 1940 |
| Champion of the Gaeilgeoirí: John Charles McQuaid and the Irish-language Mass | Bruce, James P. | Article in Journal | | 2016 |
| Chapel or church? The case of St Mary's, Pope's Quay, Cork | McParland, Edward | Article in Book | | 2012 |
| Chapel Royal and symbol of the Church Militant: the iconography of Christ Church and St Patrick's Cathedrals, Dublin, c.1660-1760 | Usher, Robin | Article in Journal | | 2007 |
| Chapel Royal, Dublin Castle | Derham, William
| Article in Journal | | 2017 |
| Chapels of Leighlinbridge, 1729 and 1788 | Nevin, Martin | Article in Journal | | 2008 |
| Chapels of Leighlinbridge, 1729 and 1788 | Nevin, Martin | Article in Journal | | 2008 |
| Chapter and verse at Jerpoint Abbey | Harbison, Peter | Article in Journal | | 2017 |
| Charles McNally : O'Connellite bishop, reforming pastor | Kerr, Donal A. | Article in Journal | | 1982 |
| Charles McNally, Maynooth professor and bishop of Clogher | Kerr, Donal A. | Article in Journal | | 1981 |
| Charleville's churches | O'Riordan, Ted | Article in Journal | | 1986 |
| Chattel, servant or citizen : women's status in church, state and society : Historical Studies XIX | | Monograph or Collective Volume | Institute of Irish Studies, Queen's University of Belfast | 1995 |
| Christ Church cathedral (C. of I.) | Stalley, Roger | Article in Book | | 2005 |
| Christ Church cathedral and its environs : medieval and beyond | O'Neill, Michael | Article in Book | | 2011 |
| Christ Church Cathedral, Dublin : a history | | Monograph or Collective Volume | Four Courts | 2000 |
| Christ Church cathedral, Dublin : a short history | Lewis-Crosby, E. H. | Monograph or Collective Volume | | 1949 |
| Christ Church Cathedral, Dublin : a survey of the nave and south transept roofs | Geaney, Máire | Article in Book | | 2006 |
| Christ Church Cathedral, Dublin, 1660-1760 | Murphy, David James | Thesis | | 1995 |
| Christ Church in the later medieval Irish world, 1300-1500 | Lydon, James F. | Article in Book | | 2000 |
| Christ Church Londonderry 1830-2005: milestones - ministers - memories | Bartlett, IanHamilton, Roy | Monograph or Collective Volume | Christ Church, Londonderry [Printed by Impact Printing, Ballycastle] | 2005 |
| Christ Church Strabane, 1879-1979 : centenary brochure | Lovell, Ernest W. | Monograph or Collective Volume | Bell, Logan and Carswell [Printer] | 1979 |
| Christ Church, Ballyholly and the Bridgetown connection | Magner, Mehaul | Article in Journal | | 2004 |
| Christ Church, Derriaghy : gravestone and church inscriptions. | Barr, W. N. C., Rev. | Monograph or Collective Volume | W. N. C. Barr | 2002 |
| Christ Church, Derriaghy, gravestone inscriptions | | Monograph or Collective Volume | W. N. C. Barr | 1980 |
| Christ Church, Dublin : the late Romanesque building campaign | Stalley, Roger | Monograph or Collective Volume | Gifford & Craven | 1973 |
| Christ Church, Fermoy : a compilation | | Monograph or Collective Volume | Eigse Books | 1984 |
| Christ Church, Kilmeen, Co. Cork , 1811-2011 | | Monograph or Collective Volume | [Kilmeen parish] | 2011 |
| Christ Church, Londonderry, 1830-1980: milestones - ministers - memories | Bartlett, Ian,Bryans, Cecil,Hamilton, Roy | Monograph or Collective Volume | Limavady Printing Company [Printer] | 1980 |
| Christchurch centre, Cork Archives Institute, under auspices of Cork Corporation, Cork County Council, University College, Cork | | Monograph or Collective Volume | Cork Archives institute | 1982 |
| Christian citizens : the Catholic church and radical politics 1790-1800 | Keogh, Dáire | Article in Book | | 1997 |
| Christianities in the early modern Celtic world | | Monograph or Collective Volume | Palgrave Macmillan | 2014 |
| Chronicle : installation of the most Reverend Cahal Brendan Daly as archbishop of Armagh and primate of all Ireland | Anonymous | Article in Journal | | 1991 |
| Chronicles and annals of mediaeval Ireland and Wales : the Clonmacnoise-group texts | Dumville, David N.Grabowski, Kathryn | Monograph or Collective Volume | Boydell Press | 1984 |
| Church and community in medieval Ireland : the diocese of Kilfenora | Ni Ghabhlain, Sinead | Article in Journal | | 1995 |
| Church and dynasty early Christian Brega : Lusk, Inis Pátraic and the case of Máel-Finnia, king and saint | Mac Shamhráin, Ailbhe | Article in Book | | 2004 |
| Church and politics, c.750-c.1100 | Byrne, J. F. | Article in Book | | 2005 |
| Church and polity in pre-Norman Ireland : the case of Glendalough | Mac Shamhráin, Ailbhe Séamus | Monograph or Collective Volume | An Sagart | 1996 |
| Church and polity in pre-Norman Ireland : the case of Glendalough | Mac Shamhráin, Ailbhe | Monograph or Collective Volume | An Sagart | 1996 |
| Church and polity in pre-Norman Ireland: the case of Glendalough | McGovern, Alan James | Thesis | | 1995 |
| Church and settlement in Ireland | | Monograph or Collective Volume | Four Courts Press | 2018 |
| Church and state : the wider issues | Comiskey, Brendan, Bishop of Ferns | Article in Journal | | 1985 |
| Church and state in 21st century Britain : the future of church establishment | | Monograph or Collective Volume | Palgrave Macmillan | 2009 |
| Church and state in Angevin Ireland | Warren, Wilfred Lewis, 1929- | Article in Journal | | 1999 |
| Church and state in Ireland : perspectives of Vatican II | Hannon, Patrick | Article in Journal | | 2017 |
| Church and state in medieval Ireland : the case of Aderrig, county Dublin | Smith, Charles | Article in Journal | | 2002 |
| Church and state in the Ireland of Míchél Ó Cléirigh | Edwards, R. W. D. (Robert Walter Dudley) | Article in Book | | 1944 |
| Church architecture in Ulster | Davies, Oliver | Article in Journal | | 1944 |
| Church archives in the United States and Canada : a bibliography | Binsfield, Edward L. | Article in Journal | | 1958 |
| Church building | Kennedy, T. P. | Article in Book | | 1968 |
| Church building in 14th century Ireland and the 'Gaelic revival' | McNeill, T. E. | Article in Journal | | 1985 |
| Church buildings and pastoral care in early medieval Ireland | Ó Carragáin, Tomás | Article in Book | | 2006 |
| Church buildings in Ireland, 1550-1850 | Oram, Richard D. | Article in Book | | 2007 |
| Church dedications of the Armagh Diocese | Mayes, Gilbert | Monograph or Collective Volume | Dundalgan Press (W. Tempest) Ltd. | 1951 |
| Church Disestablishment (1869), Synodical governance, and the legacy of women's higher education reform: the agents of reform and their Meath connection | McCormack, Christopher | Article in Journal | | 2023 |
| Church government in the south of Ireland, A.D. 1471 to 1484 | Collins, J. T. | Article in Journal | | 1957 |
| Church Island : a description | Ryan, Michael | Article in Book | | 2004 |
| Church lands in medieval Monaghan | Ó Dufaigh, Seosamh | Article in Book | | 2017 |
| Church of Corpus Christi golden jubilee, 1941-1991 | Anonymous | Monograph or Collective Volume | [s.n.] | 1991 |
| Church of Ireland church architecture in east Clare : the 'First Fruits Gothic' legacy | Daly, Gordon | Article in Journal | | 1997 |
| Church of Ireland parish churches in the Donegal group | Trimble, Harry, Rev. | Article in Journal | | 2012 |
| Church of Ireland records | Refaussé, Raymond | Monograph or Collective Volume | Irish Academic Press | 2000 |
| Church of Ireland Records | Refaussé, Raymond | Monograph or Collective Volume | Four Courts | 2006 |
| Church of Ireland vestry records | Refaussé, Raymond | Article in Journal | | 1995 |
| Church of Saints Peter and Paul, Athlone : an illustrated history and guide | Murray, Patrick, 1935- | Monograph or Collective Volume | Saints Peter and Paul's Parish Forum/Pastoral Council | 2007 |
| Church of St Peter and Paul Balbriggan, 1842-1992 | Walsh, Jim | Monograph or Collective Volume | Balbriggan Historical and Cultural Society | 1992 |
| Church of St. Barrahane. Castlehaven Parish, County Cork | | Monograph or Collective Volume | [Castlehaven parish] | 1965 |
| Church of St. John the Evangelist, Ashe Street, Tralee | O'Sullivan, Donal J. | Monograph or Collective Volume | | 2001 |
| Church of St. Polycarp : parish of Finaghy : diocese of Connor | Church of St. Polycarp | Monograph or Collective Volume | [Church of St. Polycarp] | 1932 |
| Church of the Assumption, Callan | Dalton, William,Purcell, William | Article in Book | | 2010 |
| Church of the Immaculate Conception, Knightstown, Valentia Island, Co. Kerry, 1915-2015 : 200 years anniversary | | Monograph or Collective Volume | Centenary Committee | 2016 |
| Church opinion in Northern Ireland, 1983 | Scully, Maggie | Article in Journal | | 2015 |
| Church organisation in Ireland, A.D. 650 to 1000 | Etchingham, Colmán | Monograph or Collective Volume | Laigin Publications | 1999 |
| Church Organization and Pastoral Care | Pickles, Thomas F. | Article in Book | | 2009 |
| Church records | Refaussé, Raymond | Article in Book | | 1998 |
| Church records - Co. Cavan | Plunkett-Coyle, James | Article in Journal | | 2014 |
| Church records after disestablishment | Ó Dúill, Gréagóir | Article in Journal | | 1975 |
| Church reform and Irish monastic culture in the twelfth century | Harbison, Peter | Article in Journal | | 2001 |
| Church reform in Connacht | Perros-Walton, Helen | Article in Book | | 2013 |
| Church valuables put in safe keeping before exile : receipt from Vallentine Browne : 1698 | Browne, Vallentine | Article in Book | | 1991 |
| Church Woodwork in the British Isles, 1100-1535 : An Annotated Bibliography | Faleer, Robert A., 1952- | Monograph or Collective Volume | Scarecrow Press | 2009 |
| Church, chapel and meeting house | Byrne, ArtFrazer, Marilyn | Monograph or Collective Volume | Guildhall | 1992 |
| Church, state and social science in Ireland : knowledge institutions and the rebalancing of power, 1937-73 | Feeney, MariaMurray, Peter | Monograph or Collective Volume | Manchester University Press | 2017 |
| Church, state and society | Keogh, Dermot | Article in Book | | 1988 |
| Church, state, industry, 1827-1929, in East Belfast : vivid records of social and political upheavals in the Nineteen-twenties | Redmond. John | Monograph or Collective Volume | John Aiken & Son [printers] | 1960 |
| Church-building in Moy | Dillon, Charles | Article in Journal | | 1988 |
| Church-goers in Limerick during war and revolution | Comerford, Patrick | Article in Book | | 2023 |
| Church-government and the spread of Christianity in Ireland | Dumville, David N. | Article in Book | | 1993 |
| Churches 'in antis': Skeumorphism and Solomonic Iconography in Early Irish Architecture | O'Keeffe, Tadhg | Article in Journal | | 2023 |
| Churches and communities in early medieval Ireland : towards a pastoral model | Sharpe, Richard | Article in Book | | 1992 |
| Churches and monunments | Madden, Gerard | Article in Book | | 1993 |
| Churches and Symbolic Power in the Irish Landscape | Maguire, Martin | Article in Journal | | 2004 |
| Churches and theology in a century of revolution and reaction | Pierce, Andrew | Article in Book | | 2006 |
| Churches in early medieval Ireland : architecture, ritual and memory | Ó'Carragáin, Tomás | Monograph or Collective Volume | Yale University Press | 2010 |
| Churches in the Irish Landscape Ad 400-1100 | Ó Carragáin, Tomás | Monograph or Collective Volume | Cork University | 2021 |
| Churches of Galway, Kilmacduagh and Kilfenora | May, Thomas M. | Monograph or Collective Volume | The author | 2000 |
| Churches of south-east county Dublin, seventh to twelfth century | O'Brien, Elizabeth | Article in Book | | 1988 |
| Churches of the Diocese of Connor | Scott, Ernest V. | Monograph or Collective Volume | [Diocese of Connor] | 1992 |
| Churches of the diocese of Kilmore | Kelly, Liam | Monograph or Collective Volume | Booklink | 2005 |
| Churches, people and pastors : the Church of Ireland in Victorian Dublin, 1833-1901 | Crawford, John W. R. | Thesis | | 2003 |
| Churching | Fitzsimons, Fiona | Article in Journal | | 2020 |
| Churchwarden's accounts, 1484-1600, St Werburgh's church, Dublin | Robinson, J. L. | Article in Journal | | 1914 |
| Cill i logainmneacha Co. Thiobraid Árann | Ó Cearbhaill, Pádraig | Monograph or Collective Volume | Oifig an tSoláthair | 2007 |
| Cill Mac Creithe na Trágha : Kilmacreehy, Liscannor, county Clare | Gilmore, Hilary | Article in Journal | | 2003 |
| Cillglas-Kilglas : the church by the stream : a history of the confiscation settlement and vesting of its lands | Carroll, P. J. | Monograph or Collective Volume | The author | 1996 |
| Cistercian art and architecture in the British Isles | | Monograph or Collective Volume | | 1986 |
| Cistercian monastic settlements in the Diocese of Ross | Byrne, Jim | Article in Journal | | 2013 |
| Cities and their spaces. The hinterlands of Medieval Dublin | Clarke, Howard B. | Article in Book | | 2013 |
| Cities for Gods | Hurley, Richard | Article in Journal | | 2008 |
| City of churches | Gilleece, Emma | Monograph or Collective Volume | Limerick Museum and Archives | 2014 |
| Clabby on the Map: the Church of Ireland parish of Clabby and its people | Murrow, Samuel B. | Monograph or Collective Volume | [Clabby parish] | 2006 |
| Claddagh cemetery book, 1843-1881 | Anonymous | Article in Book | | 1991 |
| Clanabogan Parish Church : Diocese of Derry : a short description of its beautiful marble decoration | Benson, T.W. | Monograph or Collective Volume | [The author?] | c. 1932 |
| Clane Abbey | Stokes, George | Article in Journal | | 1902 |
| Clare Island : the Abbey and its paintings | Manning, ConlethMorton, Karina | Monograph or Collective Volume | Archaeology Ireland | 2009 |
| Classical churches in Ulster | Curl, James Stevens | Monograph or Collective Volume | Ulster Architectural Heritage Society | 1980 |
| Clergy of Killaloe, Kilfenora, Clonfert and Kilmacduagh | Leslie, J. B. (James Blennerhassett) | Monograph or Collective Volume | Ulster Historical Foundation and Diocesan Council of Limerick and Killaloe | 2010 |
| Clergy of Kilmore, Elphin and Ardagh : biographical succession lists | | Monograph or Collective Volume | Ulster Historical Foundation|Diocesan Council Kilmore, Elphin and Ardagh | 2008 |
| Clergy of Limerick,
Clergy of Ardfert and Aghadoe :
biographical succession lists | | Monograph or Collective Volume | Ulster Historical Foundation|Church of Ireland. Diocese of Limerick. Diocesan Council|Church of Ireland. Diocese of Ardfert and Aghadoe Diocesan Council | 2015 |
| Clergy of Tuam, Killala and Achonry : biographical succession lists | | Monograph or Collective Volume | Ulster Historical Foundation|Diocesan Council Tuam, Killala and Achonry | 2008 |
| Clergy of Waterford, Lismore and Ferns : biographical succession lists | | Monograph or Collective Volume | Ulster Historical Foundation|Diocesan Council Cashel, Ossory and Ferns | 2008 |
| Clergy who served in Castlebridge | Gahan, John | Article in Book | | 2005 |
| Clerical and learned lineages of medieval Co. Clare : a survey of the fifteenth-century papal registers | McInerney, Luke | Monograph or Collective Volume | Four Courts | 2014 |
| Clerical and parish libraries | Hunt, Arnold | Article in Book | | 2006 |
| Clerical income and its sources in the parish of Moycullen, in the wardenate of Galway, in pre-Famine Ireland, 1786-1823 | Hargett, CraigLarkin, Emmet | Article in Journal | | 2009 |
| Clerical indiscipline and ecclesiastical authority in Ireland 1690-1750 | O'Flaherty, Eamon | Article in Journal | | 1992 |
| Clerical indiscipline and ecclesiastical authority in Ireland, 1690-1750 | O'Flaherty, Eamon | Article in Journal | | 1992 |
| Clerical lawyers in thirteenth-century Limerick | Swift, Catherine | Article in Book | Four Courts Press | 2024 |
| Clerics and clansmen: the vicarages and rectories of 'Tradraighe' in the fifteenth century | McInerney, Luke | Article in Journal | | 2008 |
| Clochar na Righ (Clogher of the Kings): being a history of the Town and District of Clogher, in the County of Tyrone. Also some account of the Parish of Errigal Keeroge, in the County of Tyrone, and of the Parish of Errigal Truagh in the County of Monaghan | Marshall, John J. | Monograph or Collective Volume | Tyrone Printing Co. | 1930 |
| Clogher in Celtic and Anglo-Norman Ireland | Connolly, A. G. | Article in Book | | 1940 |
| Clogher parish : some early sidesmen, 1662-1734 | Johnston, Jack | Article in Journal | | 1991 |
| Clogher record album : a diocesan history | | Monograph or Collective Volume | Cumann Seanchais Chlochair | 1975 |
| Clogher's altars of the penal days | Ó Gallachair, Pádraig | Article in Journal | | 1957 |
| Clogherici : a dictionary of the Catholic clergy of the diocese of Clogher (1535-1835) | Ó Gallachair, Pádraig | Article in Journal | | 1986 |
| Clonard as a diocesan town | Hickey, Elizabeth | Article in Journal | | 1999 |
| Clondalkin | Sherlock, Canon | Article in Journal | | 1908 |
| Clone, Ferns - a meadow of St Aidan | Corlett, ChrisElliott, Ian, 1936-2015Lacey, BarryMandal, StephenShine, Denis | Article in Journal | | 2020 |
| Clones and her neighbours in the early period : hints from some Airgialla saints' lives | McCone, Kim | Article in Journal | | 1984 |
| Clonkeen church Co. Limerick: the West Door | O'Sullivan, Aidan | Article in Journal | | 2016 |
| Clonkyne Leix | Comerford, M., P.P. | Article in Journal | | 1883 |
| Clonmacnois - the church and lands of St. Ciarán : change and continuity in an Irish monastic foundation (6th to 16th century) | Kehnel, Annette | Monograph or Collective Volume | Lit | 1997 |
| Clonmacnois and the 12th century synods | Ó Maoleachlainn, Pádraig I. | Article in Journal | | 1974 |
| Clonmacnois as a diocese | MacNamee, James Joseph | Article in Journal | | 1945 |
| Clonmacnois by Beranger, 1779 | | Article in Journal | | 1973 |
| Clonmacnoise - when experts meet ..... | Ó Ríordain, Dúlra | Article in Journal | | 1998 |
| Clonmacnoise castle | Manning, ConlethO'Conor, Kieran, | Article in Book | | 2003 |
| Clonmore Rectory in 1407 and doubts on the Calendar of Papal Letters | O'Brien, Niall C.E.J. | Article in Journal | | 2017 |
| Cloverhill : a church of Ireland parish in County Cavan, c.1720-2010 | Cherry, Jonathan | Monograph or Collective Volume | Geography | 2010 |
| Coarbs and erenachs north-west Ulster in the seventeenth century | Finegan, Cajetan | Article in Journal | | 1948 |
| Colin Johnston Robb and the 'Irish Ecclesiastical Record' | Ní Chearbhaill, Máire
| Article in Journal | | 2021 |
| Collon Church, Co. Louth | Rountree, John | Article in Journal | | 2015 |
| Collon's churches | Bellew, SéamusRoe, Séamus | Article in Journal | | 2015 |
| Colum Cille and the diocese of Derry | Lacey, Brian | Article in Book | | 2000 |
| Columban churches in Brega and Leinster : relations with the Norse | Bhreathnach, Edel | Article in Journal | | 1999 |
| Columbanus 'ad locum': The establishment of the monastic foundations | O'Hara, Alexander | Article in Journal | | 2015 |
| Columbanus and Gennadius | Cedro, Carlo | Article in Journal | | 2021 |
| Columbanus and Gildas | Winterbottom, Michael | Article in Journal | | 1976 |
| Columbanus's monasticism and the sources of his inspiration : from Basil to the Master? | Stancliffe, Clare | Article in Book | | 2011 |
| Comments on the stained glass, 'Irish Builder', 1st March 1875 | Irish Builder | Article in Book | | 2000 |
| Commissioning of bishop's messengers, St. Thomas's Church, Belfast | | Monograph or Collective Volume | [St. Thomas's Church] | 1953 |
| Commodius temples : Roman Catholic church building in nineteenth-century Dublin | Grimes, Brendan | Monograph or Collective Volume | Dublin City Public Libraries | 2010 |
| Communal solitude : the archaeology of the Carthusian houses of Great Britain and Ireland, 1178-1569 | Breeden, Francesca | Thesis | | |
| Complete summary listing of journal holdings Dublin Diocesan Library | Catholic Church (Ireland) Archdiocese of Dublin Library | Monograph or Collective Volume | Dublin Diocesan Library | 1991 |
| Conchobor ua Maíl Shechnaill and the church of Kildalkey in the 'notitiae' of the Book of Kells (c. 1030s) | Casey, Denis | Article in Journal | | 2023 |
| Conclusion : Celtic Christianities in the age of Reformations : language, community, tradition and belief | Armstrong, Robert | Article in Book | | 2014 |
| Conflict over the rectory of Cinel Luachain during the fifteenth century | Boyle, Leonard E.Earley, Joseph E. | Article in Journal | | 1999 |
| Conformity and radicalism within the Catholic church : the case of the Northern Ireland crisis | McElroy, Gerald | Article in Book | | 1991 |
| Confraternity letters of the Irish Observant Franciscans and their benefactors | Gribbin, J. A.Ó Clabaigh, Colmán N. | Article in Journal | | 2002 |
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| Conquest, coexistence and change : Wales, 1063-1415 | Davies, Robert Rees, Sir, 1938-2005 | Monograph or Collective Volume | Oxford University Press | 1987 |
| Consecration crosses at Castlemartyr | Manning, Conleth | Article in Journal | | 2013 |
| Consent, consummation and indissolubility : some evidence from mediaeval ecclesiastical courts | Cosgrove, Art | Article in Journal | | 1991 |
| Conservation and restoration of the north arcade wall | McCarthy, Mary-Liz ; Clancy, Kevin ; Walsh, Denis | Article in Book | | 2022 |
| Conservation at Clonfert : discoveries made during work on the Romanesque portal | Ellis, Jason | Article in Journal | | 2003 |
| Conservation plan : the National Cathedral and Collegiate Church of Saint Patrick, Dublin | Hanna, Mary | Monograph or Collective Volume | St. Patrick's Cathedral | 2006 |
| Conservation works at Cormac's Chapel | O'Dea, Michele | Article in Journal | | 2018 |
| Conserving the dream : treasures of St. Finbarre's Cathedral | | Monograph or Collective Volume | Heritage Council | 2005 |
| Contemporary Irish church architecture | Cantwell, WilfredHurley, Richard | Monograph or Collective Volume | Gill & Macmillan | 1985 |
| Contending coarbs:"Cindus fuair Mlaise in Bealach?" | Smith, Peter J. | Article in Journal | | 2014 |
| Contested consecrations and the pursuit of ecclesiastical independence in Scotland and Ireland in the early 1120s | O'Leary, Aideen M. | Article in Journal | | 2018 |
| Continuity and change : the material setting of public worship in the sixteenth-century Pales | Moss, Rachel | Article in Book | | 2011 |
| Contrasting similarities : Bishops Troy and Lisovskii in Ireland and Belorussia in the age of the French Revolution | Flynn, James T. | Article in Journal | | 2001 |
| Contribution to a history of the Basilica of Saint Clement in Rome | Kane, Eileen | Article in Journal | | 1984 |
| Controversies and ethnic tensions | Flechner, RoyMeeder, Sven | Article in Book | | 2016 |
| Controversy and schism in the Synod of Ulster in the 1820's | Holmes, Finlay | Article in Book | | 1981 |
| Convenants and constitutions in Irish Baptist churches | Thompson, Joshua | Article in Journal | | 1989 |
| Convent archives as sources for Irish history | Luddy, Maria | Article in Book | | 2005 |
| Convention of Drumceatt, 575: XIVth centenary 1975 | Barbour, Liam M.Boyd, Hugh AlexanderClarke, WallaceClayden, Stanley C.Moore, R. DenholmMorton, T. RalphRoemmele, Peter M.Seymour, A. N.Simms, George OttoWalsh, John R. | Monograph or Collective Volume | | 1975 |
| Converging worlds : Paul Cullen in the world of Mauro Cappellari | Korten, Christopher | Article in Book | | 2011 |
| Conversion and consolidation in Leinster's royal heartland | Gleeson, PatrickÓ Carragáin, Tomás | Article in Book | | 2016 |
| Conversion to Christianity | Charles-Edwards, T. M. (Thomas Mowbray) | Article in Book | | 2003 |
| Conversion, church and cathedral : the diocese of Dublin to 1152 | Clarke, Howard B. | Article in Book | | 2000 |
| Conwal Parish, Letterkenny Church, 1636-1986 | Slater, Joan | Monograph or Collective Volume | [Conwal parish] | 1986 |
| Coolbanagher medieval font - an insight | Murray, Sean | Article in Journal | | 2016 |
| Corbelled Drystone Churches | Ó Carragáin, Tomas | Article in Book | | 2022 |
| Corcomroe Abbey and the English Medieval Wool Trade | Mac Mahon, Michael | Article in Journal | | 2024 |
| Corcomroe Abbey ship graffito: a sacred and secular symbol | Lochnan, Katherine | Article in Journal | | 2011 |
| Cork : a diocesan history | Bolster, Angela | Article in Journal | | 1973 |
| Cork with Ross, A.D. 1199 | Ó Foghludha, Risteárd | Article in Journal | | 1952 |
| Cormac's Chapel : the beginnings of Irish romanesque | De Paor, Liam | Article in Book | | 1967 |
| Cornerstone of memory : John Hughes & St. Patrick's Cathedral: sixteenth Ernie O'Malley lecture, 2014 | Casey, Marion R. | Article in Journal | | 2015 |
| Corpus genealogiarum sanctorum Hiberniae | | Monograph or Collective Volume | Institute for Advanced Studies | 1985 |
| Correspondence of Abp Carpenter, with BP Sweetman of Ferns | Curran, Michael | Article in Journal | | 1956 |
| Correspondence of Irish interest in the Lettere in Propaganda Archives, vol. 38 (1657-1664) | | Article in Journal | | 1990 |
| Councils and ecclesiastical documents relating to Great Britain and Ireland | | Monograph or Collective Volume | | 1869 |
| Councils and synods of the Gaelic early and central Middle Ages | Dumville, David N. | Monograph or Collective Volume | University of Cambridge, Department of Anglo-Saxon, Norse, and Celtic | 1997 |
| Count Ó Donel proposes a coadjutor for the see of Raphoe, 1777 | O'Donnell, Terence | Article in Journal | | 1954 |
| Court Abbey, A Franciscan Third Order Regular Friary, Lavasgh, Co. Sligo | Conroy, Elaine | Article in Journal | | 2021 |
| Craft as union, craft as demarcation : the decoration at Belfast cathedral | McBrinn, Joseph | Article in Book | | 2008 |
| Crafts and religious guilds in Dublin : the accounts of Holy Trinity guild, 1549-1558 | Gillespie, Raymond | Article in Book | | 2009 |
| Cremore Presbyterian Church, 1802-2002 | Anonymous | Article in Journal | | 2003 |
| Crosses in County Down | Hamlin, Ann | Article in Journal | | 2000 |
| Cu Chuimne, Ruben and the compilation of the Collectio canonum hibernensis | Jaski, Bart | Article in Journal | | 2000 |
| Cuairt an Ard-easbaig Cróc ar Thír Chonaill (1891) | Ó Baoighill, Pádraig | Article in Journal | | 2006 |
| Cult, church and collegiate church before c.1220 | Clarke, Howard B. | Article in Book | | 2009 |
| Cultural affiliations of early Ireland in the penetentials | Oakley, Thomas Pollock | Article in Journal | | 1933 |
| Culture and diplomacy. The Spanish Hapsburg dimension in the Irish Counter Reformation movement, c.1529-c.1629 | Downey, Declan M. | Thesis | | 1994 |
| Culture and religion, 1815-70 | Hill, Myrtle | Article in Book | | 2011 |
| Cushendun Old Church | Goyer, Kerry | Article in Journal | | 2007 |
| Custos spiritualitatis sede vacante (Dublin) | Luce, A. A. | Article in Journal | | 1939 |
| Dagger John : Archbishop John Hughes and the Making of Irish America | Loughery, John | Monograph or Collective Volume | Cornell University Press | 2018 |
| Daire Mór and Longford pass | Manning, Conleth | Article in Journal | | 1998 |
| Daire Mór identified | Manning, Conleth | Article in Journal | | 1997 |
| Dalkey Island adventure 2003 | Flynn, Mairead | Article in Journal | | 2018 |
| Dandys, luggers, herring and mackerel : a local study in the context of the Irish Sea fisheries in the nineteenth century | McCaughan, Michael | Article in Book | | 1989 |
| Daniel Grose's 1792 drawing of Castledermot parish church | Harbison, Peter | Article in Journal | | 1992 |
| Daniel Grose's depictions of the island monasteries of Lough Ree | Murtagh, Harman | Article in Book | | 2015 |
| Daniel Mannix, priest and patriot | Gilchrist, Michael | Monograph or Collective Volume | [s.n.] | 1982 |
| Daniel Murphy c.1842-1924. Builder, Market Street, Bandon | Canniffe, Pat | Article in Journal | | 2019 |
| Daniel Murray, 1768-1852 | Flannery, Maeve | Article in Journal | | 2008 |
| Daniel Murray, archbishop of Dublin, 1823-1852 | Lysaght, Moira | Article in Journal | | 1974 |
| Daniel Murray, archbishop of Dublin, 1823-1852 | Murray, P. J. | Article in Journal | | 1985 |
| Danish church frescoes : a clue to medieval Irish art | Mills, James | Article in Journal | | 1979 |
| Das Bibelwerk : Organisation and Quellenanalyse of the New Testament section | Kelly, J. F. T. | Article in Book | | 1987 |
| Das Papsttum und die bayerische Kirche - Bonifatius als Gegenspieler Virgils | Schmidinger, Heinrich | Article in Book | | 1985 |
| Dating the Irish synods in the Collectio canonum hibernensis | Richter, Michael, 1943-2011 | Article in Journal | | 2000 |
| David Moriarty (1814-77) : 1, the making of a bishop | O'Shea, Kieran | Article in Journal | | 1972 |
| David Moriarty (1814-77) : 4, ecclesiastical affairs | O'Shea, Kieran | Article in Journal | | 1973 |
| David Rothe | Hegarty, Maureen | Article in Journal | | 1979 |
| Davide Moriarty's episcopal leadership in the diocese of Kerry, 1854-77 | Rafferty, Oliver P. | Article in Book | NA | 2020 |
| De oratorio : Hisperica famina and church building | Brady, Niall | Article in Journal | | 1997 |
| De statu ecclesiae of Gilbert of Limerick | Pike, Brigid | Thesis | | 1976 |
| Dean Richardson's further account of com. Cavan | Davies, OliverGaffikin, M.Paterson, T.G.F. | Article in Journal | | 2013 |
| Deane's western architectural gems | Murphy, Oliver | Article in Journal | | 2011 |
| Dearcadh na nGael ar Dhia sna Meán-aoiseanna | Ó Héalaí, Pádraig | Article in Book | | 1971 |
| Death comes to the archbishop | Dempsey, Anthony | Article in Journal | | 1939 |
| Death in the garden: Patrick Byrne's mortuary chapel at Goldenbridge Cemetery, Dublin | Hurley, Livia | Article in Journal | | 2016 |
| Decrees of a Meath diocesan synod, 1686 | | Article in Journal | | 1957 |
| Decreta of late eleventh-century Irish bishops-elect | Holland, Martin
| Article in Journal | | 2010 |
| Dedicated to St. Anne | Scarlett, Duncan | Monograph or Collective Volume | Choice Publishing and Book Services in co-op with Duncan Scarlett | 2007 |
| Dedication and restoration of St. Patrick's Cathedral, Armagh | Anonymous | Article in Journal | | 2003 |
| Defamation and the church courts in early sixteenth-century Armagh | McCafferty, John | Article in Journal | | 1994 |
| Defending the established order : Richard Woodward, bishop of Cloyne (1726-94) | Kelly, James, 1959- | Article in Book | | 2009 |
| Deference, accommodation and conflict in Irish confessional relations | Comerford, R. V. (Richard VIncent) | Article in Book | | 2015 |
| Demolition of the church of St Mary on the Hill : 1651 : agreement between the mayor of Galway and Prior Pierce Butler | Anonymous | Article in Book | | 1991 |
| Denis Harty : vicar apostolic of Killaloe, 1657-1667 | Murphy, Ignatius | Article in Journal | | 1989 |
| Deoise Ard Mhacha sa dara céad déag | Ó Ciobháin, Breandán | Article in Journal | | 1978 |
| Deoisí na hÉireann i ndiaidh Shionaid Cheanannais, 1152 - Téacsanna | Ó Ciobháin, Breandán | Article in Journal | | 1973 |
| Deoisí na hÉireann i ndiaidh Shionaid Cheannannais, 1152 - foinsí éagsúla | Ó Ciobháin, Breandán | Article in Journal | | 1973 |
| Deoisí na hÉireann i ndiaidh Shionaid Cheannannais, 1152 - nótaí téacsa | Ó Ciobháin, Breandán | Article in Journal | | 1973 |
| Deoisí na hÉireann i ndiaidh Shionaid Cheannannais, 1152 - Téacsanna | Ó Ciobháin, Breandán | Article in Journal | | 1973 |
| Dependent or independent? The Church of Ireland and its colonial context, 1536-1649 | Ford, Alan, 1956- | Article in Journal | | 1995 |
| Der Liber ex lege Moysis | Kottje, Raymund | Article in Book | | 1987 |
| Derbforgaill: twelfth-century abductee, patron and wife | Ó Hoireabhárd, Seán | Article in Journal | | 2022 |
| Derriaghy : a short history of the parish | Barr, W. N. C., Rev. | Monograph or Collective Volume | W. N. C. Barr | 2006 |
| Derry : an outline history of the diocese | Bonner, Brian | Monograph or Collective Volume | Foilseachain Naisiunta Teo | 1982 |
| Derry Cathedral : a book of the bells : service of dedication, July 25th, at 6.30p.m.: the story of the bells 1614-1929 | Derry Cathedral | Monograph or Collective Volume | David Irvine [printer] | 1929 |
| Derry Cathedral : a book of the bells : service of dedication, July 25th, at 6.30p.m.: the story of the bells 1614-1929 | Lawlor, H. J. (Hugh Jackson), 1860-1938 | Article in Journal | | 1917 |
| Derry Diocesan Archive | Daly, Edward | Article in Journal | | 2005 |
| Derry diocese on the eve of the plantation | Jefferies, Henry A. | Article in Book | | 1999 |
| Derry, Iona, England and the governance of the Columban church | Dumville, David N. | Article in Book | | 1999 |
| Derrynaflan and other early church treasures | Richardson, Hilary | Article in Journal | | 1980 |
| Design and function : the construction and decoration of Cormac's Chapel at Cashel | Stalley, Roger | Article in Book | | 2006 |
| Design sources for St Patrick's Cathedral, Dublin, and its relationship to Christ Church Cathedral | O'Neill, M. | Article in Journal | | 2000 |
| Details of the restoration of Christ Church Cathedral, Dublin with a brief history of its preceding condition, from the date of its supposed foundation (A.D. 1038) to the present time | M'Vittie, Robert B. | Monograph or Collective Volume | Porteous and Gibbs | 1878 |
| Dhá athchuinge as Achaidh Chonaire | Mac Fhinn, Pádraig Eric, 1895-1987 | Article in Journal | | 1961 |
| Diarmait Mac Murchada and Romanesque Leinster : four twelfth-century churches in context | O'Keeffe, Tadhg | Article in Journal | | 1997 |
| Diary of a country parish : Christ Church - Ardkeen, diocese of Down | Bell, Frank W.A. | Monograph or Collective Volume | [Frank W. A. Bell] | 2000 |
| Dictionary of Dublin dissent : Dublin's protestant dissenting meeting houses, 1660-1920 | ffeary-Smyrl, Steven | Monograph or Collective Volume | A & A Farmar | 2009 |
| Dictionary of the American hierarchy (1789-1964) | Code, J. B. | Monograph or Collective Volume | Wagner | 1964 |
| Did Bishop Malchus of Waterford resign because of the Synod of Raithbreasail? | O'Connor, Dónal | Article in Journal | | 2012 |
| Die Baugeschichte der Regensburger Schottenkirche St. Jakob und ihres Kreuzgangs | Stocker, Mona | Article in Book | | 2005 |
| Die Entstehung der Kathedrale | Sedlmayer, Hans | Monograph or Collective Volume | Atlantis-Verlag | 1950 |
| Die Iren und Europa im früheren Mittelalter. 2 vols. | | Monograph or Collective Volume | | 1982 |
| Die irische Kanonensammlung. | | Monograph or Collective Volume | | 1885 |
| Diocesan anomalies (the diocese of Connor) | Lawlor, H. C. (Henry Cairnes), 1870-1943 | Article in Journal | | 1939 |
| Diocesan dimensions of a die-hard dispute : Richard FitzRalph and the friars in evolving perspective | Haren, Michael | Article in Book | | 2006 |
| Diocesan synods and convocations in Armagh on the eve of the Tudor reformations | Jefferies, Henry A. | Article in Journal | | 1995 |
| Diocese of Achonry: church, land and history | Mac Cotter, Paul | Article in Journal | | 2014 |
| Diocese of Annaghdown | Fahey, J. | Article in Journal | | 1903 |
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| Diocese of Armagh : sources and problems | Ó Fiaich, Tomás | Article in Journal | | 1955 |
| Diocese of Clogher : parochial records, Monaghan | McKenna, James E. | Monograph or Collective Volume | [Fermanagh Herald Office] | 1920 |
| Diocese of Killaloe. Vol. 3 : 1851-1904 | Murphy, Ignatius | Monograph or Collective Volume | Four Courts | 1995 |
| Diocese of Kilmore (1678-1728) | MacKiernan, Francis J. | Article in Journal | | 2002 |
| Diocese of Meath : historical sketch | Mills, Thomas | Article in Book | | 1938 |
| Diocese of Raphoe, 1773-1805 | Silke, John J. | Article in Journal | | 1985 |
| Directory of the Catholic clergy of the diocese of Cloyne & Ross, 1836-1893 : including available obituary lists | | Monograph or Collective Volume | B. Troy | 1994 |
| Disestablishment and the lay response | Milne, Kenneth | Article in Book | | 2002 |
| Disestablishment in Ireland and Wales | Lucas, John,Morris, Bob | Article in Book | | 2009 |
| Disestablishment – in the nick of time | Milne, Kenneth | Article in Journal | | 2019 |
| Dive Downes' journal in Carbery | Downes, Dive | Article in Journal | | 2010 |
| Divided by a common religion : ecclesiastical identity and the creation of a 'savage other' in medieval Dublin and Wicklow | Lawlor, Chris | Article in Book | NA | 2021 |
| Divine law in the Pauline commentary of the eighth-century Hiberno-Latin "reference Bible" | Carella, Bryan | Article in Journal | | 2011 |
| Dlithe an Domhnaigh in Éireann 600-750 A.D. | Herbert, Máire | Article in Book | | 1997 |
| Documents concerning the Collegium Pastorale Hibernicum of Louvain, 1624 | | Article in Journal | | 1951 |
| Documents concerning the diocese of Meath | | Article in Journal | | 1942 |
| Documents relating to the appointment of John Stafford as coadjutor to the bishop of Ferns, 1772 | Corish, Patrick J. | Article in Journal | | 1972 |
| Documents relating to the suppression of the Templars in Ireland | | Article in Journal | | 1967 |
| Dominic Maguire, O. P. Archbishop of Armagh : 1684-1707 | Fenning, Hugh | Article in Journal | | 1999 |
| Dominicans in Cork city : a history | Doherty, Gillian | Monograph or Collective Volume | Carrigtwohill | 2024 |
| Domnach Mór Meic Laithbe | Moore, Eoghan | Article in Journal | | 2014 |
| Donacomper Church | Kirkpatrick, W. T. | Article in Journal | | 1899 |
| Donegal abbey : the buildings | Leask, H. G. (Harold G.) | Article in Book | | 1952 |
| Donegal and Derry bishops help decide 1911 North Tyrone by-election | Dooher, John | Article in Journal | | 2010 |
| Donegal's Presbyterians : the Ulster-Scots connection | Baraniuk, Carol,Fergusan, Frank | Article in Book | | 2013 |
| Doneraile Catholic Church | Shine, Michael | Article in Journal | | 1997 |
| Down and its parish church | Pooler, L.A. | Monograph or Collective Volume | Down Recorder Office (Printer) | 1907 |
| Down Cathedral : the church of Saint Patrick of Down | Rankin, J. Frederick | Monograph or Collective Volume | Ulster Historical Foundation | 1997 |
| Dr Charles McNally's 'Relationi Status', October 1853 | Anonymous | Article in Journal | | 1989 |
| Dr Cullen's appointment to Armagh 1849 | Macaulay, Ambrose | Article in Journal | | 1980 |
| Dr James Donnelly, bishop of Clogher (1865-1893) and the ascendancy in Monaghan | Murnane, James H. | Article in Journal | | 1987 |
| Dr James Donnelly, bishop of Clogher (1865-1893) and the ascendancy in Monaghan. Part 2 | Murnane, James H. | Article in Journal | | 1988 |
| Dr James Louis O'Donnell (1737-1811), first bishop of Newfoundland | O'Connell, Philip | Article in Journal | | 1965 |
| Dr James Magauran, bishop of Ardagh (1815-29) | Traynor, Owen | Article in Journal | | 1972 |
| Dr John Carpenter, archbishop of Dublin, 1760-86 | Mac Giolla Phádraig, B. | Article in Journal | | 1976 |
| Dr Mannix | Brennan, Niall | Monograph or Collective Volume | Angus & Robertson | 1965 |
| Dr Michael Sheehan in Australia, 1922-1937 | Byrnes, Gregory | Article in Book | | 1991 |
| Dr. Butler and the Jerusalem pony | O'Brien, Pat | Article in Journal | | 2001 |
| Dr. George Cromer, Archbishop of Armagh (1521-1543), and Henry VIII's reformation | Jefferies, Henry A. | Article in Book | | 2001 |
| Dr. Plunkett, bishop of Meath, 1779-1827 | Flood, J. M. | Article in Journal | | 1949 |
| Dressing the dead | Nicholl, John | Article in Journal | | 2020 |
| Dromore : an Ulster diocese | Atkinson, E. D. | Monograph or Collective Volume | W. Tempest, Dundalgan Press | 1925 |
| Dromore diocese, historical notes | | Monograph or Collective Volume | [s.n.] | 1939 |
| Druids, deer and 'words of power' : coming to terms with evil in medieval Ireland | Borsje, Jacqueline | Article in Book | | 2008 |
| Drumadoon bell shrine, one of the most significant archaeological finds in Ireland goes on display | Dennis, P. | Article in Journal | | 2004 |
| Drumcliffe : the Church of Ireland parish in its North Sligo setting | Durand, Stella | Monograph or Collective Volume | [Drumcliffe Parish] | 2000 |
| Drumlion Church | Keenehan, John | Article in Book | | 2006 |
| Dublin and the reform of the Irish church : eleventh and twelfth centuries | Holland, Martin | Article in Journal | | 2000 |
| Dublin churches | Costello, Peter | Monograph or Collective Volume | Gill & Macmillan | 1989 |
| Dublin diocesan archives | Curran, Michael | Article in Journal | | 1958 |
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| Dublin Diocesan Archives : Hamilton papers (2) | Hamilton, JohnPurcell, Mary | Article in Journal | | 1990 |
| Dublin Diocesan Archives : Hamilton Papers (4) | Purcell, Mary | Article in Journal | | 1993 |
| Dublin diocesan archives : Hamilton papers (4) | Purcell, Mary | Article in Journal | | 1993 |
| Dublin Diocesan Archives : Hamilton Papers (5) | Purcell, Mary | Article in Journal | | 1994 |
| Dublin diocesan archives : Hamilton papers (5) | Purcell, Mary | Article in Journal | | 1994 |
| Dublin Diocesan Archives : Hamilton Papers (6) | Purcell, Mary | Article in Journal | | 1995 |
| Dublin Diocesan Archives : Hamilton Papers (7) | Purcell, Mary | Article in Journal | | 1996 |
| Dublin Diocesan Archives : Hamilton Papers (8) | Purcell, Mary | Article in Journal | | 1997 |
| Dublin Diocesan Archives : Hamilton papers (9) | Purcell, Mary | Article in Journal | | 1998 |
| Dublin Diocesan archives : Murray papers (4) | Purcell, Mary | Article in Journal | | 1984 |
| Dublin diocesan archives : Murray Papers (6) | Purcell, MarySheehy, David C. | Article in Journal | | 1986 |
| Dublin diocesan archives : Murray papers, 5 | Purcell, Mary | Article in Journal | | 1985 |
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| Dublin's pro-cathedral, 1812-1975 | Purcell, Mary | Monograph or Collective Volume | [s.n.] | 1975 |
| Dublin’s lost medieval church of St Michael | Dooley, Sheila | Article in Book | | 2019 |
| Dublin’s stained glass : a guide to the finest twentieth-century windows | Caron, David | Monograph or Collective Volume | Four Courts Press | 2025 |
| Duiske abbey, Graignamanagh : abbey triumphant | Hughes, E. W. | Article in Journal | | 1977 |
| Duleek's later urban development | French, Noel | Article in Journal | | 2017 |
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| Dungiven Bawn Re-edified | Blades, B. S.Brannon, N. F. (Nick) | Article in Journal | | 1981 |
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| Early ecclesiastical precincts and landscapes of Inishowen, County Donegal | Adams, MaxO'Brien, Colm | Article in Book | | 2016 |
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| Early Irish Gospel-books at St. Gallen | Meehan, Bernard | Article in Book | | 2025 |
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| Early Irish saints | Ó Ríordáin, John J. | Monograph or Collective Volume | Columba Press | 2001 |
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| Ecclesia Hibernicana : die Synode von Inis Pádraig im Jahre 1148 | Immenktter, H. | Article in Journal | | 1985 |
| Ecclesiastical antiquities of Down, Connor, and Dromore, consisting of a taxation of those dioceses compiled in the year MCCCVI | Dunlop, EullReeves, William | Monograph or Collective Volume | Braid Books|Moyola Books | 1992 |
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| Ecclesiastical justice and the enforcement of the reformation : the case of Archbishop Browne and the clergy of Dublin | Murray, James | Article in Book | | 1995 |
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| Ecclesiastical records of England, Ireland, and Scotland to the reformation | Hart, Richard | Monograph or Collective Volume | | 1836 |
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| Enforcing reformation in Ireland and Scotland, 1550-1700 | | Monograph or Collective Volume | Ashgate | 2006 |
| Enforcing the English Reformation in Ireland : clerical resistance and political conflict in the Diocese of Dublin, 1534-1590 | Murray, James | Monograph or Collective Volume | Cambridge University Press | 2009 |
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| English Monks and Irish Reform in the Eleventh and Twelfth centuries | Bethell, Denis L. T. | Article in Book | | 1971 |
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| Enniskillen, parish and town | Dundas, William Harloe | Monograph or Collective Volume | William Tempest|Alfred Weaver | 1913 |
| Enough religion to make us hate : reflections on religion and politics | Griffin, Victor | Monograph or Collective Volume | Typemasters | 2009 |
| Entre Castigo y asimilación : los irlandeses y la Inquisición espanola (1580-1750) | O'Connor, Thomas | Article in Book | | 2014 |
| Eoghan Ó hAirt, 1562-1603 | Ó Claidhimh, Liam | Article in Journal | | 1961 |
| Eoin Baiste Mac Sleighne, easpag (1693-1712), agus patrún ar an léann Gaelach | Ó Conchúir, Breandán | Article in Book | | 1983 |
| Eoin MacNeill and a 'Celtic' church in early medieval Ireland? | Wycherley, Niamh | Article in Book | | 2022 |
| Episcopal appointments and ecclesiastical gravamina during Prince Edward's lordship of Ireland | O'Brien, Alphonsus | Thesis | | 1961 |
| Episcopal decision-making in Ireland | Keogh, Dermot | Article in Book | | 1992 |
| Episcopal edicts of the Diocese of Ossory in the eighteenth century, I : the edicts of Thomas Burke (1709-1776). | Ó Fearghail, Fearghus | Article in Journal | | 2006 |
| Episcopal hierarchy in Connacht and Tairdelbach Ua Conchobair | Etchingham, Colmán | Article in Journal | | 2000 |
| Episcopal visitations of the dioceses of Cloyne and Ross, 1785-1828 [with index] | Derr, Eric A. | Article in Journal | | 2013 |
| Episcopi vagantes in church history | MacDonald, A. J. | Article in Journal | | 1940 |
| Episodes in the history of Easter cycles in Ireland | Harrison, Kenneth | Article in Book | | 1982 |
| Erenaghs and Termonlands : another early seventeenth-century account | Jefferies, Henry A. | Article in Journal | | 2002 |
| Erenaghs in pre-plantation Ulster : an early seventeenth-century account | Jefferies, Henry A. | Article in Journal | | 1999 |
| Érlam : the patron-saint of an Irish church | Charles-Edwards, T. M. (Thomas Mowbray) | Article in Book | | 2002 |
| Ethnic tensions, episcopal leadership and the emergence of the twentieth century American Catholic church : the Cleveland experience | Leonard, Henry B. | Article in Journal | | 1985 |
| Eucharistic vessels, architecture and liturgical celebration in early medieval Ireland | Ryan, Michael | Article in Book | | 2005 |
| Evangelicalism and the churches in Ulster society, 1770-1850 | Hill, Myrtle | Thesis | | 1987 |
| Evangeliorum Quattuor Codex Cenannensis. Vol. 3 | | Monograph or Collective Volume | Urs Graf Verlag | 1951 |
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| Evidence for a tympanum at Aghadoe, Co. Kerry | Rynne, Etienne | Article in Journal | | 1987 |
| Evidence for an Early Medieval Ecclesiastical Site, Kilmeane, Mote Demesne, Co Roscommon | McGuinness, David | Article in Book | | 2023 |
| Evidence for contacts between the churches of the Irish and English from the Synod of Whitby to the Viking age | Hughes, Kathleen Winifred | Article in Book | | 1971 |
| Evidence fot the location of the medieval parish church of Rathcormac: excavations at Dispensary Lane, 2004 | Moloney, Colm | Article in Journal | | 2010 |
| Excavating an archive | Baker, Christine | Article in Journal | | 2012 |
| Excavation at St Mary's cathedral, Tuam, Co. Galway | Clyne, Miriam | Article in Journal | | 1987 |
| Excavation of a multi-period site at Stalleen, Co. Meath, by Mandy Stephens 2022 : Research in the Bru na Boinne World Heritage Site | NA | Monograph or Collective Volume | Chapel Press | 2022 |
| Excavation of an Early Christian cemetery and settlement at Reask, County Kerry | Fanning, T. | Article in Journal | | 1981 |
| Excavation of Kilteel church, Co. Kildare | Manning, Conleth | Article in Journal | | 1982 |
| Excavations at Church Road and the early monastic foundation at Lusk, Co. Dublin | O'Connell, Aidan | Article in Book | | 2009 |
| Excavations at Cormac's chapel, Cashel, 1992 and 1993 : a preliminary statement | Hodkinson, Brian | Article in Journal | | 1994 |
| Excavations at Kells priory, County Kilkenny | Fanning, Thomas | Article in Journal | | 1973 |
| Excavations at Mellifont abbey, Co. Louth | De Paor, Liam | Article in Journal | | 1969 |
| Excavations at Moor Abbey, Co. Tipperary | Lynch, Ann | Article in Journal | | 2018 |
| Excavations at Moyne graveyard, Shrule, Co. Mayo | Manning, C. | Article in Journal | | 1987 |
| Exchange and trade in early medieval Ireland | Doherty, Charles | Article in Journal | | 1981 |
| Explaining parochial and diocesan boundaries | Cullen, Seamus | Article in Book | | 1999 |
| Explanations in Tomfinlough (Fenloe) church and graveyard | Carey, Olive | Article in Journal | | 2002 |
| Exploring the medieval and early modern settlement of Noughaval in the Burren | Campbell, Eve | Article in Journal | | 2013 |
| Extents of Irish monastic possessions, 1540-1541, from manuscripts in the Public Record Office, London | | Monograph or Collective Volume | The Stationery Office [for the Irish Manuscripts Commission] | 1943 |
| External influences and relations, c.1220 to c.1500 | Clarke, Howard B. | Article in Book | | 2009 |
| Extracts from some issues of 'Archivium Hibernicum' and 'Collectanea Hibernica' concerning Killala diocesan affairs up to 1800 | MacHale, Edward | Article in Journal | | 1989 |
| Extracts from Virginia church records | O'Brien, Michael J. | Article in Journal | | 1919 |
| Extracts relating to Co. Louth from the Calendar of the register of Primate Nicholas Fleming | Gwynn, Aubrey | Article in Journal | | 1949 |
| Fabrics of faith : the material worlds of Catholic Ireland and Protestant Ireland, 1500-1800 | Barnard, T. C. (Toby Christopher) | Article in Book | | 2011 |
| Faith and fatherland : the 'Irish News', the Catholic hierarchy and the management of dissidents | Buckley, Pat | Monograph or Collective Volume | Belfast Historical and Educational Society | 1991 |
| Faith and patronage : the political career of Flaithrí Ó Maolchonaire, c.1560-1629 | Hazard, Benjamin | Monograph or Collective Volume | Irish Academic Press | 2009 |
| Faith in place : Roscrea and Kyle, a Church of Ireland parish history, by Adrian Hewson, including 'The Book of Dimma' by George O. Simms | Hewson, AdrianSimms, George Otto, archbishop of Armagh. | Monograph or Collective Volume | J. F. Walsh | 1990 |
| Faith of our fathers : the Gaelic aristocracy in Co. Offaly and the counter-reformation | Lyttleton, James | Article in Book | | 2009 |
| Faith, Famine and Fenianism : Paul Cullen and the Irish emigrant world | Moran, Gerard | Article in Book | | 2011 |
| Fall from grace | Broderick, Joe | Monograph or Collective Volume | Brandon | 1992 |
| Fassaroe and associated crosses | Ó Héailidhe, P. | Article in Journal | | 1958 |
| Fasti ecclesiae Hibernicae; the succession of the prelates and members of the cathedral bodies in Ireland. 5 vols (and supplement) | | Monograph or Collective Volume | | 1845 |
| Fasting and feasting on Irish church sites : the archaeological and historical evidence | Harney, Lorcan | Article in Journal | | 2016 |
| Father and son. The stained glass windows of Joshua and Harry Clarke, St Flannan's Church, Killaloe, Co. Clare | MacGabhann, Donncha | Article in Journal | | 2009 |
| Father John Hennessy, P.P. : 'Protestant priest' | Hyland, Cecil | Article in Journal | | 1988 |
| Father Matts round towers | Mulcahy, J. | Article in Journal | | 1989 |
| Father Tom : an authorised portrait of Cardinal Tomás Ó Fiaich | Fitzgerald, B. | Monograph or Collective Volume | Fount | 1990 |
| Female trouble : ambivalences and anxiety at the Nuns' church | Overbey, Karen Eileen | Article in Book | | 2008 |
| Fenagh: The Church of Ireland story | Leyden, Padraig | Monograph or Collective Volume | Fenagh Church Restoration Committee | 1989 |
| Ferns | Grannell, Fergal | Article in Journal | | 1967 |
| Ferns | Furlong, Nicholas | Article in Book | | 1999 |
| Ferns marriage licences | Stanley-Torney, Henry C. | Article in Journal | | 1921 |
| Field trips with Dr F.X. McCorry | McCorry, F.X. (Francis Xavier) | Article in Journal | | 2015 |
| Fifteen hundredth anniversary, St. Saviour's Church, Connor | Carmody, W. P., Rev.,Hogmeester, A. S., Rev. | Monograph or Collective Volume | [St Saviour's Church, Connor] | 1980 |
| Fifteenth-century Irish provincial legislation and pastoral care | Burrows, M. A. J. | Article in Book | | 1989 |
| Fifteenth-century vestments in Waterford | MacLeod, Catriona | Article in Journal | | 1952 |
| Finding the city of God in the lives of St Kevin : Glendalough and the history of the Irish celestial civitas | Maddox, Melanie C. | Article in Book | | 2011 |
| Finnian or Winniau? | Ó Riain, Pádraig | Article in Book | | 1984 |
| Fitzpatrick's Boston, 1846-1866 : John Bernard Fitzpatrick, third bishop of Boston | O'Connor, Thomas H. | Monograph or Collective Volume | Northeastern UP | 1984 |
| Florence Conry, archbishop of Tuam | Jennings, Brendan | Article in Journal | | 1949 |
| Florence Conry, Archbishop of Tuam, 1608–1629 | Neary, J. | Article in Journal | | 1911 |
| Florentia monasteriorum | O'Brien, Caimin | Article in Journal | | 2009 |
| Folk memories of North Clare | Keating, Tom | Article in Journal | | 2024 |
| For 'decency and order' : the Church of Ireland's acquisition and use of silver in the Stuart period | Cunningham, Jessica | Article in Book | Four Courts Press | 2025 |
| Fore and its ancient buildings | Sharkey, Olive | Monograph or Collective Volume | Magpie Publications | 2004 |
| Fore, Co. Westmeath : national monuments in the charge of the Commissioners of Public Works : St Fechin's church, the town gateways, and the Benedictine priory | Leask, H. G. (Harold G.) | Monograph or Collective Volume | Stationery Office | 1938 |
| Forgotten stones : ancient church sites of the Burren and environs | Swinfen, Averil | Monograph or Collective Volume | Lilliput Press | 1992 |
| Forty years on : Diocese of Down and Dromore, Diocese of Connor 1945-1985 | Macourt, William A. | Monograph or Collective Volume | Universal Publishing | 1985 |
| Forward march : a short history of the Church of Ireland in Ballyholme | Mercer, John J. G. | Monograph or Collective Volume | [The author] | c. 1960 |
| Fourtowns Presbyterian Church | Wylie, Griffith | Article in Journal | | 1988 |
| Fr Batt O'Connor and the Killorglin Tithe War 1835 | O'Reilly, Hugh | Article in Journal | | 2011 |
| Fr Ferris's parish histories : Ballymacelligott, Ballyseedy, O'Brennan and Nohaval | Ferris, William | Monograph or Collective Volume | Red Hen Publishing | 2018 |
| Fr Francis Leynagh's letter (1725) | Ó Háinle, Cathal G. | Article in Journal | | 2005 |
| Fr Martin Doyle - the man and his times | Joyce, John | Article in Journal | | 2013 |
| Fr Robert O'Keeffe, parish priest, and the Callan controversy 1869-81 | Hogan, Patrick | Article in Book | | 1990 |
| Fr. John Casey, antiquarian | MacMahon, Bryan | Article in Book | | 2012 |
| Fr. John Flatley (1846-1929) - Turbulent priest | McGinley, Michael | Article in Journal | | 2012 |
| Fr. Owen (Eugene) McCarthy, 1822-1857 | MacMahon, Bryan | Article in Book | | 2012 |
| Fragmenta Rapotensiana : contributions towards a diocesan dictionary | Ó Canann, Tomás | Article in Journal | | 1996 |
| Fragments of a twelfth-century doorway at the Church of St Multose, Kinsale? | Ní Ghrádaigh, Jenifer | Article in Journal | | 2003 |
| Francis Makemie (c.1657-1708) : father of American Presbyterianism | Kirkpatrick, Laurence S. | Article in Book | | 2015 |
| Franciscan architecture in pre-reformation Ireland | Mooney, Canice | Article in Journal | | 1955 |
| Franciscan chalices, 1600-50 | Krasnodebska-D'Aughton, Malgorzata | Article in Book | | 2009 |
| Franciscan Donegal : a souvenir of the dedication of the Franciscan church, Ros Nuala, to the Immaculate Heart of Mary, on Sunday, 29th June, 1952 | NA | Monograph or Collective Volume | Franciscan Friary, Ros Nuala | 1952 |
| Franciscan faith : sacred art in Ireland 1600 - 1750 | | Monograph or Collective Volume | Wordwell | 2011 |
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| Frederick Lucas, The Tablet and Ireland : a Victorian forerunner of Liberation Theology | Gilley, Sheridan | Article in Book | | 1993 |
| Freshford doorway | Lanigan, Katharine | Article in Journal | | 1969 |
| From 'city of God' to a blueprint for the future : Glendalough in the nineteenth century | Ní Cheallaigh, Máirín | Article in Book | | 2011 |
| From David to Labraid : sacral kingship and the emergence of monotheism in Israel and Ireland | Carey, John | Article in Book | | 2008 |
| From early to late: uncovering medieval Ferns....recent excavations... | McLoughlin, Catherine | Article in Journal | | 2020 |
| From Hathrantone to Star of the Sea - Catholic places of worship in Portstewart | Wilson,Frances A.
| Article in Journal | | 2016 |
| From Hiberno-Norse to Anglo-Norman, c.1030-1300 | Kinsella, Stuart | Article in Book | | 2000 |
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| From Tuam to Ballyspellan | Ó Fearghail, Feargus | Article in Journal | | 1987 |
| From Venice to Monasterevin : the altar rails in the Church of Sts. Peter and Paul | Whelan, Beatrice | Article in Journal | | 2002 |
| Frontiers in the Irish church - regional and cultural | Simms, Katharine | Article in Book | | 1995 |
| Fundraising in an Irish provincial town: a story from the 19th century | Feheney, J.M. | Article in Journal | | 2014 |
| Funerary monuments and memorials in the Church of Ireland (Anglican) cathedral of St Patrick, Armagh | Curl, James Stevens | Monograph or Collective Volume | Historical Publications | 2013 |
| Further evidence for the influence of the Hibernensis in southern Italy : an early eleventh-century canonistic florilegium at Montecassino | Reynolds, Roger E. | Article in Journal | | 2005 |
| Further notes on the history and antiquities of the parish of Clane | Sherlock, Canon | Article in Journal | | 1905 |
| Gaelic friars and Gothic design | Stalley, Roger | Article in Book | | 1990 |
| Gallarus Oratory. This contribution... records folk beliefs attached to the well-known early medieval oratory | Dowd, Marion | Article in Journal | | 2021 |
| Galway Catholic Parish Churches, 1846 | Mac Lochlainn, Alf, 1926- | Article in Journal | | 2003 |
| Galway diocesan archives | Power, J. | Article in Journal | | 1993 |
| Galway goldsmiths, their marks and ware | Mulveen, Jack | Article in Journal | | 1994 |
| Galway's heritage in stone, no. 9. Part 1. The 2023 archaeological and conservation works at St Nicholas' Collegiate Church Galway [by Jim Higgins and Frank Coyne] ; Part 2 Archaeological and conservation works at Menlo Castle Galway [by Jim Higgins and Martin Fitzpatrick] | Higgins, Jim ; Coyne, Frank ; Fitzpatrick, Martin | Monograph or Collective Volume | Crow's Rock Press | 2023 |
| Garrycloyne church - an archaeological survey | Higgins, Michael | Article in Journal | | 2002 |
| Gems of Architecture: St Catherine's Church, Fenagh, Co. Leitrim | Marshall, Julie | Article in Journal | | 2017 |
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| George Edmund Street's account of the architecture of Christ Church Cathedral 1882 | Street, George Edmund | Article in Book | | 2000 |
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| Geschichte der Irischen Kirche von ihren Anfängen bis zum 12. Jahrhundert | Delius, Walter | Monograph or Collective Volume | Reinhardt | 1954 |
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| Giuseppe Mazzini and Irish nationalism, 1845-70 | Barr, Colin | Article in Journal | | 2008 |
| Glass in the Glens | Rogers, Frank | Article in Journal | | 2001 |
| Glass in the Glens : a study of stained glass windows in churches in the Glens of Antrim | Rogers, Frank | Monograph or Collective Volume | Impact Printing | 2004 |
| Gleanings from Glenavy Parish | Totten, Jean | Monograph or Collective Volume | [Glenavy Parish] | 1980? |
| Gleanings from the Shournagh | Sheehan, Tim | Article in Journal | | 2013 |
| Glencolumbkille : a history 3000 BC - 1885AD | Manning, Aidan | Monograph or Collective Volume | Donegal Democrat [printer] | 1985 |
| Glendalough | Corlett, Christiaan | Monograph or Collective Volume | Coles Lane | 2017 |
| Glendalough : city of God | | Monograph or Collective Volume | Four Courts | 2011 |
| Glendalough : liturgy and music | Casey, Sara G. | Article in Book | | 2011 |
| Glendalough : the Royal Society of Antiquaries of Ireland's contribution to its preservation, examination and illustration | Ireland, Aideen | Article in Book | | 2011 |
| Glendalough and its churches | Manning, Conleth | Article in Journal | Archaeology Ireland | 2016 |
| Glengariff : Sacred Heart Church 1902-2002 : a centenary celebration | Anonymous | Monograph or Collective Volume | Committee members, etc. | 2002 |
| Glimpses of catholic Ireland in the eighteenth century : restoration of the daughters of St Brigid by the most rev. Dr Delaney | Gibbons, Margaret | Monograph or Collective Volume | NA | 1932 |
| Glimpses of Tuam through the centuries : Proceedings of a seminar, 28th September 2013 | | Monograph or Collective Volume | Old Tuam Society | 2014 |
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| God and the gun : the church and Irish terrorism | Dillon, Martin | Monograph or Collective Volume | Orion | 1997 |
| God's Irishmen : theological debates in Cromwellian Ireland | Gribben, Crawford | Monograph or Collective Volume | Oxford University Press | 2007 |
| God's river in spate : the story of the religious awakening in Ulster in 1859 | Carson, John T. | Monograph or Collective Volume | Presbyterian Church of Ireland | 1958 |
| Godfrey Day, missionary, pastor and primate : a memoir | Hartford, R. R. | Monograph or Collective Volume | Talbot Press | 1940 |
| Going global for God : A portrait of Ballyheigue's missionary movement | Ó hAllmhuráin, Micheál | Monograph or Collective Volume | Ballyheigue History and Heritage Group | 2016 |
| Gordonville, Dundrum | Van Turnhout, Michael | Article in Journal | | 2018 |
| Gorestown Catholic Church | Dillon, Charles | Article in Journal | | 2001 |
| Gothic revival architecture in Ireland. 2 vols. | Richardson, D. S. | Monograph or Collective Volume | | 1983 |
| Government attitudes to religious nonconformity in Ireland 1660-1719 | McGuire, James | Article in Book | | 1987 |
| Great Connell Abbey, Co. Kildare | Fitzgerald, Walter, Lord | Article in Journal | | 1899 |
| Great men we have given to history : Ted O'Riordan looks at the life of Dr Mannix, archbishop of Melbourne | O'Riordan, Ted | Article in Journal | | 1987 |
| Gregory VII and the Irish church | Gwynn, Aubrey | Article in Journal | | 1948 |
| Grey Abbey Parish : Saint Saviour's Parish Church, Grey Abbey, County Down | Ridgway, G. P. | Monograph or Collective Volume | [Grey Abbey Parish] | 1969 |
| Grey Abbey, County Down | Anonymous | Monograph or Collective Volume | | 1964 |
| Greystones 1864-1964 | French, Samuel | Monograph or Collective Volume | [The author] | 1964 |
| Groomsport parish church, 1842-1992 : a shorth history of the parish and its people in commemorationof 150 years of witness to the work of the Lord Jesus Christ in a small Ulster community | Mowat, Raymond B. | Monograph or Collective Volume | [Groomsport parish] | 1992 |
| Guide to church records : an Irish genealogical source | Public Record Office of Northern Ireland | Monograph or Collective Volume | Ulster Historical Foundation on behalf of (the) Public Record Office of Northern Ireland | 1994 |
| Guide to the Díseart : treoraí agus eolaí | | Monograph or Collective Volume | An Sagart | 2010 |
| Habitual masonry styles and the local organisation of Church building in early medieval Ireland | Ó Carragáin, Tomás | Article in Journal | | 2005 |
| Halfway between Dublin and Cork : a history of the parish of Urlingford and Graine | Hayes, Margaret | Monograph or Collective Volume | The author | 2015 |
| Hallowed by saints, coveted by kings : Christianisation and land tenure in Rathdown c. 400-900 | Boazman, Gill | Article in Book | | 2016 |
| Hand-bells of the Celtic church in Scotland | Purser, John W. | Article in Journal | | 2006 |
| Handbook of the cathedral church of St. Fin Barre, Cork | Caulfield, Richard | Monograph or Collective Volume | Purcell & Co. | 1881 |
| Handlist of Irish diocesan histories | Anonymous | Article in Journal | | 1957 |
| Harnessing the tides : the early medieval tide mills at Nendrum Monastery, Strangford Lough | Crothers, NormanMcErlean, Thomas, | Monograph or Collective Volume | The Stationery Office : Environment and Heritage Service | 2007 |
| Harry Clarke's windows for Diseart Chapel, Presentation Convent, Dingle | Kennedy, Róisín | Article in Journal | | 2019 |
| Haunting the graveyard : the secrets of a County Antrim friary | Forrest, Stephen | Article in Book | | 2010 |
| Heart of Iona : a people, a parish, a place : celebrating 100 years of St. Columba's Church, 1905-2005 | | Monograph or Collective Volume | Centenary Committee | 2005 |
| Henry II as a founder of monasteries | Hallam, Elizabeth M. | Article in Journal | | 1977 |
| Henry II, the Council of Cashel and the Irish bishops | Flanagan, Marie Therese | Article in Journal | | 1996 |
| Henry Ó Dochartaigh : vicar-general of the diocese of Meath | Bonner, Brian | Article in Journal | | 1980 |
| Heresy in Ireland in the thirteenth and fourteenth centuries | Williams, Bernadette | Article in Book | | 2013 |
| Hermits and anchorites in late medieval Ireland | Ó Clabaigh, Colmán N. | Article in Book | | 2010 |
| Hiberno-Latin theology | Kelly, J. F. | Article in Book | | 1982 |
| Hiberno-romanesque churches | Downey, LiamO'Sullivan, Muiris | Article in Journal | | 2020 |
| Hidden Figures: a recently uncovered window at Ballysheen Church | Mac Gearailt, Micheál | Article in Journal | | 2024 |
| Hierarchia catholica medii et recentioris aevi. Vol. 7 : 1800-1846 | Pirminus, P.Ritzler, P. Remigius | Monograph or Collective Volume | Il Messaggero di S. Antonio | 1968 |
| High-Victorian stained glass by Lavers & Barraud in six churches in county Cork | Lawrence, David
| Article in Journal | | 2012 |
| Hillsborough : a parish in the Ulster Plantation | Barry, John | Monograph or Collective Volume | William Mullen & Son | 1982 |
| His Excellency, His Eminence and the minister : Paul Cullen and channels of political communication during the first Gladstone administration, 1868-74 | Murphy, James H. | Article in Book | | 2011 |
| His grace is displeased: selected correspondence of John Charles McQuaid | | Monograph or Collective Volume | Merrion | 2012 |
| Historic buildings, groups of buildings, areas of architectural importance in Rathfriland and Hilltown | Rankin, P. J. | Monograph or Collective Volume | Ulster Architectural Heritage Society | 1979 |
| Historic buildings, groups of buildings, areas of architectural importance in the town of Carrickfergus | Campbell, G.Crowther, S. | Monograph or Collective Volume | | 1978 |
| Historic buildings, groups of buildings, areas of architectural importance in the town of Cavan | Garner, W. | Monograph or Collective Volume | Ulster Architectural Heritage Society | 1978 |
| Historic buildings, groups of buildings, buildings of architectural importance in Donaghadee and Portpatrick | Dixon, HughKenmuir, K.Kennett, J. | Monograph or Collective Volume | Ulster Architectural Heritage Society | 1977 |
| Historic sites and traditions. I. Rev. William Reeves' 'Sites of ancient churches in the county of Armagh - December 1879' | | Article in Journal | | 1996 |
| Historic St Michan's | Troy, M.C. | Article in Journal | | 1930 |
| Historic Ulster Churches | Walker, Simon, 1970- | Monograph or Collective Volume | Institute of Irish Studies, Queen's University Belfast | 2000 |
| Historical highlights ; Parish of Aghaderg, Diocese of Dromore, Co. Down | Little, G. N. | Monograph or Collective Volume | Banbridge Chronicle Press [Printers] | 1989 |
| Historical notes of the parish of Kildress (Diocese of Armagh) : a lecture | Young, J. M. | Monograph or Collective Volume | Mid-Ulster Printing Works [printer] | 1913 |
| Historical Notes on the abbey and parish of Bangor | Carey, J. A. | Monograph or Collective Volume | John Aiken & Son | 1919 |
| Historical notes on the Parish of Tullylish | Myles, E. A. | Monograph or Collective Volume | Newton Publishing [printer] | 1937 |
| Historical notes on the parishes of Tullanisken and Clonoe | | Monograph or Collective Volume | [The author?] | 1937 |
| Historical notice of the Cathedral of the Holy and Undivided Trinity at Down: its past and present state, and the efforts for its improvement and restoration | [Down Cathedral] | Monograph or Collective Volume | Marcus Ward and Co. [Printer] | 1872 |
| Historical notices of the Anglican Archbishops of Armagh, Primates of All Ireland, during the nineteenth century | Garstin, John Ribton | Monograph or Collective Volume | W. Tempest, for private circulation. | 1900 |
| Historical sketch of Drumcree parish: diocese of Armagh | Rennison, H. W. | Monograph or Collective Volume | 'The Witness' Office | 1927 |
| Historical sketch of the Cathedral of the Holy Trinity of Down. Downpatrick | Parkinson, Edward | Monograph or Collective Volume | Down Recorder [printer] | 1904 |
| Historical studies, III : papers before the Fourth Irish Conference of Historians | | Monograph or Collective Volume | Bowes & Bowes | 1961 |
| Historical studies, IV | | Monograph or Collective Volume | Bowes & Bowes | 1963 |
| Historical studies, IX : Papers read before the Irish Conference of Historians, Cork, 29-31 May 1971 | | Monograph or Collective Volume | Blackstaff Press | 1974 |
| Historical studies, V | | Monograph or Collective Volume | Bowes & Bowes | 1965 |
| Historical studies, VIII | | Monograph or Collective Volume | Gill and Macmillan | 1971 |
| History and antiquities of the diocese of Ossory | Carrigan, William, 1860-1924 | Monograph or Collective Volume | [s.n.] | 1980 |
| History articles in the 'Irish Ecclesiastical Record', 1950-1968 | Ní Chearbhaill, Máire | Article in Journal | | 2023 |
| History in phrases | Walsh, Paul, Revd, 1885-1941 | Article in Journal | | 1938 |
| History in stone | Smith, Des | Article in Journal | | 1996 |
| History of Annaghdown [ = title page] | Goaley, Michael | Monograph or Collective Volume | [The author]|Printed by Berry's, Westport | 1998 |
| History of Ballymacarrett Parish, Church of Ireland, Diocese of Down | Salmon, Stewart | Monograph or Collective Volume | [St Patrick's Church, Ballymacarrett] | 1993 |
| History of Clonmel | Burke, William P. | Monograph or Collective Volume | | 1907 |
| History of Holy Cross abbey and its relics | Anonymous | Article in Journal | | 1939 |
| History of Killeshin Parish. | Fennell, W.H. | Article in Journal | | 2012 |
| History of Seagoe Parish | Riley, David | Monograph or Collective Volume | [The author] | 1995 |
| History of St Mary's Cathedral, Limerick | Abbot, T. F., Rev. | Monograph or Collective Volume | George McKern & Sons | 1936 |
| History of St Mary's Cathedral, Limerick | Abbott, T. F., CanonDowd, James, Rev., | Monograph or Collective Volume | George McKern & Sons | 1936 |
| History of St. Mary's Church, Killarney | | Monograph or Collective Volume | [The author] | no date given |
| History of St. Michael's Church, Castle Caulfeild (Parish of Donaghmore, Co. Tyrone) | Burges, Ynyr A. | Monograph or Collective Volume | Tyrone Printing Co. | 1966 |
| History of St. Michael's Church, Castle Caulfield (Parish of Donaghmore Co. Tyrone) | Burges, Ynyr A. | Monograph or Collective Volume | Tyrone Printing Company | 1920 |
| History of the archdiocese of Boston in the various stages of its development 1604 to 1943. Vol. 1-3 | Harrington, Edward T.Lord, R. H.Sexton, John E. | Monograph or Collective Volume | Sheed & Ward | 1944 |
| History of the Catholic Diocese of Dublin | | Monograph or Collective Volume | Four Courts Press | 2000 |
| History of the diocese of Ardagh | MacNamee, James Joseph | Monograph or Collective Volume | Browne and Nolan | 1954 |
| History of the diocese of Clogher | | Monograph or Collective Volume | Four Courts | 2005 |
| History of the diocese of Dublin, 1 | Ronan, Myles V. (Myles Vincent) | Article in Journal | | 1956 |
| History of the ecclesiastical ruins at Annaghdown | Goaley, Michael | Monograph or Collective Volume | The author | 1981 |
| History of the Methodist Church in Carlow | O'Hara, Anne | Article in Journal | | 2011 |
| History of the parish of Derrykeighan for three centuries | Camac, Thomas | Monograph or Collective Volume | Northern Constitution [Printer] | 1930 |
| history of the parish of Foxrock | Cronin, Patrick | Monograph or Collective Volume | Foxrock Local History Club | 1984 |
| History of the parish of Knockbreda | Carmody, William Patrick | Monograph or Collective Volume | R. Carswell & Son | 1929 |
| History of the parish of St. Luke, Cork | Salter, George Alfred | Monograph or Collective Volume | [St. Luke's parish] | No date given |
| History of the Parish of Tynan in the County of Armagh: with notices of the O'Neill, Hovenden, Stronge and other families connected with the district | Marshall, John J. | Monograph or Collective Volume | Tyrone Printing Co. | 1932 |
| History of the ruling eldership in Irish presbyterianism | Barkley, J.M. | Thesis | | 1952 |
| History of Trinity College Mission 1912-34 | Trinity College Mission | Monograph or Collective Volume | Trinity College Mission | 1934 |
| History of west Cork and the diocese of Ross | Holland, William | Monograph or Collective Volume | Southern Star | 1950 |
| History, antiquities, and present state of the parishes of Ballysadare and Kilvarnet, in the county of Sligo: with notices of the O'Haras, the Coopers, the Percevals, and other local families | O'Rourke, T. | Monograph or Collective Volume | James Duffy and Sons | c. 1870 |
| Hold firm : John Charles McQuaid and the second Vatican Council | Carty, Francis Xavier | Monograph or Collective Volume | Columba | 2007 |
| Holding up a lamp to the sun: Hiberno-papal relations and the construction of Irish orthodoxy in John Lynch’s Cambrensis Eversus (1662) | Ryan, Salvador | Article in Book | | 2013 |
| Hollywood, County Wicklow : with an account of its owners to the commencement of the seventeenth century | Fitzgerald, Walter, Lord | Article in Journal | | 1917 |
| Holy Cross 1902-2002 : centenary souvenir | | Monograph or Collective Volume | Horizon Publications | 2002 |
| Holy Cross Abbey | Mullaney, Michael | Article in Book | | 2012 |
| Holy Cross Abbey, Co. Tipperary | Morris, Thomas | Monograph or Collective Volume | Eason | 1986 |
| Holy Cross and the language of Irish late Gothic | O'Donovan, Danielle | Article in Book | | 2011 |
| Holy Cross church, Kenmare, 150 (1864-2014) : a social and local history | Holycross 150 History Group, Kenmare | Monograph or Collective Volume | Holy Cross 150 History Group | 2014 |
| Holy images from England: Medieval English alabaster sculpture in Ireland | Cannan, Fergus | Article in Journal | | 2014 |
| Holy Redeemer Church, 1792-1991 : a Bray parish | Ó Cathaoir, Brendan | Monograph or Collective Volume | Church of the Most Holy Redeemer | 1991 |
| Holy ships - Ships on plaster at medieval ecclesiastical sites in Ireland | Brady, KarlCorlett, Christiaan | Article in Journal | | 2004 |
| Holy Trinity Church Crosshaven, Co. Cork : a short illustrated history to celebrate the sesquincentenary, 1868-2018 | Gill, Jennifer | Monograph or Collective Volume | Templebredy Church | 2018 |
| Holy Trinity Church, Westport | Hastings, Caitríona | Article in Journal | | 2014 |
| How Cashel and Emly were united | Ó Laoí, Cristóir | Article in Journal | | 1990 |
| How Christianity came to Britain and Ireland | Brown, Michelle P. | Monograph or Collective Volume | Lion | 2006 |
| How the Church of Ireland is organised | Rooke, W. W. L. | Monograph or Collective Volume | A.P.C.K. | 1947 |
| How the Church of Ireland was disestablished | Sherman, Hugh | Monograph or Collective Volume | | 1970 |
| How the diocese of Meath came to be | Walsh, Paul, Revd, 1885-1941 | Article in Book | | 1938 |
| Hugh McMahon, bishop of Clogher, 1707-15, and archbishop of Armagh, 1715-37 | Flynn, L. J. | Article in Journal | | 1973 |
| Huguenot church registers in Ireland | Costello, Vivien | Article in Book | | 1992 |
| Human frontiers in medieval Irish religious literature | Reid, Jennifer Karyn | Article in Book | | 2013 |
| If these stones could speak... | Jennings, Fergal | Article in Journal | | 2019 |
| Imagining St Caillín : the making of the Book of Fenagh | Gillespie, Raymond | Article in Book | | 2016 |
| Imago Christi? | Jenkins, David | Article in Journal | | 2021 |
| Immanuel Church, Parish of Ardoyne : the early years | Griffith, D. W., Canon | Monograph or Collective Volume | [C.R. Print (Printer)] | 1990 |
| Immigration, land, probate, administration, baptismal, marriage, burial, trade, military and other records of the Irish in America in the seventeenth and eighteenth century | O'Brien, Michael J. | Article in Journal | | 1915 |
| Improving clergymen, 1660-1760 | Barnard, T. C. (Toby Christopher) | Article in Book | | 1995 |
| Imventory | Heckett, Elizabeth WincottLamb, Peter.Teehan, Virginia | Article in Book | | 2004 |
| In his hand: 1870-1970 | Carson, G.J.A.Cave, S.A.Fawcett, F.W.Gebbie, J.H.Lovell, E.W.O'MPike, J.Ruddock, D. | Monograph or Collective Volume | Universal Publishing | 1970 |
| In omnibus caritas : a sermon preached before the general synod, 1890 | Jellett, Henry | Article in Book | | 2004 |
| In our keeping : the archives of the Congregation of the Irish Dominican Sisters, Cabra | Horgan, Dominique | Article in Journal | | 1994 |
| In the footsteps of O'Donovan and O'Flyn. Settlement and religious practice in the parish of Kiltullagh from 1828 to 1858 | McGuire, Kevin | Article in Journal | | 2019 |
| In the shadow of the fairy hill : a history of Shinrone and Ballingary from pre-Christian times to the early 1900s | Mac Mahon, Noel | Monograph or Collective Volume | Kilcommon Press | 1998 |
| In the shadow of the spire : a profile of St John's parish | Fitzmaurice, W.Hannan, Kevin | Monograph or Collective Volume | [s.n.] | 1991 |
| In the tradition of St Finbarr : the parish of St Finbarr, Cork | Walsh, T. J. (Timothy J.) | Monograph or Collective Volume | Guy | 1951 |
| Inaugural address delivered by the right rev. Dr. Moran, bishop of Ossory, at the first meeting of the Ossory Archaeological Society, 7th January, 1874 | Moran, Patrick Francis, cardinal, 1830–1911 | Article in Journal | | 1879 |
| Inch Abbey and parish | Donnelly, Maureen | Monograph or Collective Volume | Newtonards Chronicle [Printer] | 1979 |
| Index to Killala and Achonry administration bonds | Ffolliott, Rosemary | Article in Journal | | 1975 |
| Index to Killala and Archonry wills | | Article in Journal | | 1967 |
| Index to Kilmore diocesan wills | | Monograph or Collective Volume | [s.n.] | 1975 |
| Index to the Irish Ecclesiastical Record 1864-1917 : documents | | Article in Journal | | 1959 |
| Influences of ancient Irish law on the Collectio Canonum Hibernensis | Sheehy, Maurice P. | Article in Book | | 1971 |
| Inishdooey and its ancient church | Lacey, Brian; Mac Gairbheá; O'Toole, Peter (Aerial photographs) | Article in Journal | | 2024 |
| Inishmacsaint and a lost diocesan border | Gallagher, Patrick | Article in Journal | | 1953 |
| Inishmurray : monks and pilgrims in an Atlantic landscape volume one : archaeological survey and excavations | | Monograph or Collective Volume | Collins | 2008 |
| Inistioge priory cloister arcade | Manning, Conleth | Article in Journal | | 1976 |
| Initial findings at Kilteasheen, Knockvicar, Co. Roscommon | Barton, KevinFinan, ThomasRead, Christopher | Article in Journal | | 2005 |
| Inquisition concerning the parishes of Co. Louth 1658 | Leslie, J. B. (James Blennerhassett) | Article in Journal | | 1929 |
| Inscriptions and heraldry from St Michael's Church, Charlestown, County Louth | Bellew, Seamus | Article in Journal | | 2012 |
| Inspiring stones : a Church of Ireland history of the dioceses of Limerick, Ardfert, Aghadoe, KIllaloe, KIlfenora, Clonfert, Kilmacduagh and Emly | Hewson, Adrain | Monograph or Collective Volume | The Diocesan Council of Limerick, Killaloe and Ardfert | 1995 |
| Insular Christianity : alternative models of the church in Britain and Ireland, c. 1570 – c. 1700 | | Monograph or Collective Volume | Manchester University Press | 2013 |
| Interim report on the excavations at Kells priory, Co. Kilkenny, 1980 | Fanning, Thomas | Article in Journal | | 1981 |
| Interlocking Spaces: - The Relative Location of Medieval Parish Churches, Churchyards, Marketplaces and Town Halls | Simms, Anngret | Article in Book | | 2006 |
| Interpretation of round towers - public appeal or professional opinion? | Corlett, Christiaan | Article in Journal | | 1998 |
| Introduction | Wooding, Jonathan M. | Article in Book | | 2010 |
| Introduction | Dunlevy, Mairead | Article in Book | | 2004 |
| Introduction | Bhreathnach, Edel | Article in Book | | 2019 |
| Introduction | Refaussé, Raymond | Article in Book | | 2000 |
| Introduction | Kinealy, ChristineSwift, Roger | Article in Book | | 2006 |
| Introduction | Ryan, James G. | Article in Book | | 1992 |
| Introduction | Scott, Brendan | Article in Book | Cumann Seanchais Bhreifne | 2025 |
| Introduction | Refaussé, Raymond | Article in Book | | 2009 |
| Introduction : Father Luke Wadding - a multifaced Irishman in a global world | Binasco, Matteo | Article in Book | | 2020 |
| Introduction : Religious acculturation and affiliation in early modern Gaelic Scotland, Gaelic Ireland, Wales and Cornwall | Ó hAnnracháin, Tadhg | Article in Book | | 2014 |
| Invading inspirations | Dunne, Margaret | Article in Book | | 1997 |
| Inventory | Heckett, Elizabeth WincottLamb, PeterTeehan, Virginia | Article in Book | | 2004 |
| Inventory of articles belonging to the friary of Donegal, 1698 | Egan, Bartholomew, OFM | Article in Book | | 1952 |
| Iona v. Kells : succession, jurisdiction and politics in the Columban Familia in the later tenth century | Clancy, Thomas Owen | Article in Book | | 2011 |
| Iona, Kells and Derry : the history and hagiography of the monastic Familia of Columba | Herbert, Máire | Monograph or Collective Volume | Clarendon Press | 1988 |
| Ireland and Christendom : the bible and the missions | | Monograph or Collective Volume | | 1987 |
| Ireland and Europe in the twelfth century : reform and renewal | | Monograph or Collective Volume | Four Courts | 2006 |
| Ireland and Scotland in the later middle ages | Stalley, Roger | Article in Book | | 1994 |
| Ireland and the Council of Basel | Schofield, A. N. E. D. | Article in Journal | | 1967 |
| Ireland and the council of Trent | Carey, F. P. | Article in Journal | | 1945 |
| Ireland and the Council of Trent | Brady, John, d.1963 | Article in Journal | | 1946 |
| Ireland and Würzburg in the middle ages | Gwynn, Aubrey | Article in Journal | | 1952 |
| Ireland at the Vatican council. parts 1-2 | Mac Suibhne, Peadar | Article in Journal | | 1960 |
| Ireland in early mediaeval Europe : studies in memory of Kathleen Hughes | | Monograph or Collective Volume | Cambridge University Press | 1982 |
| Ireland in Europe : Paolo Giovio's Descriptio (1548) | Harris, Jason | Article in Journal | | 2007 |
| Ireland's second cardinal, Edward McCabe (1816-1885) | McCabe, Brian | Article in Journal | | 2002 |
| Ireland, 1815-70 : emancipation, famine and religion | | Monograph or Collective Volume | Four Courts | 2011 |
| Ireland, Brittany and England : transmission and use of the "Collectio Canonum hibernensis" | Dumville, David N. | Article in Book | | 1994 |
| Iren auf dem Continent. Das Leben des Marianus Scottus von Regensburg und die Anfange der irischen Schottenklöster | Weber, Stefan | Monograph or Collective Volume | Mattes Verlag | 2010 |
| Irish Anglicanism, 1869-1969 : essays on the role of Anglicanism in Irish life | NA | Monograph or Collective Volume | NA | 1970 |
| Irish Anglicanism, 1969–2019 : Essays to mark the 150th anniversary of the Disestablishment of the Church of Ireland | | Monograph or Collective Volume | Four Courts Press | 2019 |
| Irish archaeology and the poetry of Edmund Spenser : content and context | Herron, Thomas, 1968- | Article in Book | | 2009 |
| Irish art and architecture from prehistory to the present | Harbison, PeterPotterton, HomanSheehy, Jeanne | Monograph or Collective Volume | Thames & Hudson | 1978 |
| Irish Baptist church records | Gribbon, H. D. | Article in Book | | 1992 |
| Irish bishops and clergy in exile in mid-seventeenth century France | D'Ambrienes, René,Ó Ciosáin, Éamon | Article in Journal | | 2008 |
| Irish bishops, their biographers and the experience of revolution | McCafferty, John | Article in Book | | 2011 |
| Irish cardinals | Ní Chearbhaill, Maire | Monograph or Collective Volume | Elton Press | 1983 |
| Irish cathedral libraries before 1700 | Gillespie, Raymond | Article in Book | | 2005 |
| Irish church : architecture in the era of Vatican II | Hurley, Richard | Monograph or Collective Volume | Dominican Publications | 2001 |
| Irish church finances after the disestablishment | Shearman, Hugh | Article in Book | | 1949 |
| Irish church libraries and the French Enlightenment | McKee, Jane | Article in Book | | 1999 |
| Irish Church Records | Sharkey, Joan | Article in Journal | | 2012 |
| Irish church-building : popery, Pugin and the Protestant ascendancy | Sheehy, Jean | Article in Book | | 1995 |
| Irish churches and monasteries : an historical and architectural guide | O'Reilly, Sean D. | Monograph or Collective Volume | Collins Press | 1997 |
| Irish churches and monastic buildings. 3 vols. | Leask, H. G. (Harold G.) | Monograph or Collective Volume | Dundalgan Press | 1955 |
| Irish Cistercian monasteries and their carved decoration | Henry, Françoise, 1902-1982 | Article in Journal | | 1966 |
| Irish clergy abroad | Marshall, William | Article in Book | | 2006 |
| Irish clergy and the diocesan church in the 'four obedient shires' of Ireland, c.1400-c.1540 | Booker, Sparky | Article in Journal | | 2014 |
| Irish clergy in the high and late middle ages | Empey, C. A. (Adrian) | Article in Book | | 2006 |
| Irish clerics and Jacobites in early eighteenth-century Paris, 1700-30 | O'Connor, Priscilla | Article in Book | | 2001 |
| Irish croziers of the eighth and ninth centuries | Bourke, Cormac | Article in Book | | 1987 |
| Irish Dominican medieval architecture | Conlon, Patrick | Article in Book | | 2002 |
| Irish Dominican medieval architecture | Conlan, Patrick, 1940- | Article in Book | | 2002 |
| Irish ecclesiastical architecture, with some notice of similar or related work in England, Scotland and elsewhere | Champneys, ArthurDe Paor, Liam | Monograph or Collective Volume | Irish University Press | 1970 |
| Irish ecclesiastical history and the papal archives : 2, the archives of the Sacred Congregation de Propaganda Fide | Millett, Benignus | Article in Journal | | 1956 |
| Irish ecclesiastical history and the papal archives : 3, the archives of the Nunziatura di Fiendra | Giblin, Cathaldus | Article in Journal | | 1956 |
| Irish ecclesiastical history and the papal archives, introduction | Corish, Patrick J. | Article in Journal | | 1956 |
| Irish ecclesiastical history since 1500 | Corish, Patrick J. | Article in Book | | 1981 |
| Irish elements in the Catechesis Celtica | Ó Laoghaire, Diarmuid, SJ | Article in Book | | 1987 |
| Irish emigration to England explored through buildings : the Green and the Grey | Lyster, Samantha | Monograph or Collective Volume | Liverpool University Press on behalf of Historic England | 2025 |
| Irish episcopal meetings, 1788-1882 : a juridico-historical study | Cannon, Sean | Monograph or Collective Volume | Pontifical University | 1979 |
| Irish episcopal temporalities in the 13th century | Cosgrove, Art | Article in Journal | | 1974 |
| Irish episcopal temporalities in the thirteenth century | Cosgrove, Art | Article in Journal | | 1974 |
| Irish episcopalians in the Scottish episcopal diocese of Glasgow and Galloway during the nineteenth century | Meredith, Ian | Article in Book | | 2011 |
| Irish Franciscan archbishop of Dublin : Thomas Fleming, 1623-1655 | Barrett, Fergus | Article in Journal | | 1941 |
| Irish Franciscan friary architecture : late medieval and early modern | O'Neill, Michael | Article in Book | | 2009 |
| Irish Gothic theory before Pugin | Masheck, J. D. C. | Article in Journal | | 1981 |
| Irish Jewish records as a genealogical source | Siev, Raphael | Article in Book | | 1992 |
| Irish kings and bishops in the memoria of the German Schottenklöster | Ó Riain-Raedel, Dagmar | Article in Book | | 1984 |
| Irish manuscript ecclesiastical census returns | Royle, Stephen A. (Stephen Arthur) | Article in Journal | | 1982 |
| Irish monastic charters, 1142-1230 | Flanagan, Marie-Thérèse | Thesis | | 1973 |
| Irish or Welsh? excavations at the early medieval site of St Patrick's Chapel, St David's, Pembrokeshire, Wales | Murphy, Ken | Article in Book | | 2024 |
| Irish possessions of St. Thomas of Acre | Brooks, E. St. J. | Article in Journal | | 1956 |
| Irish Presbyterian registers | McClelland, Aiken | Article in Journal | | 1959 |
| Irish Quaker records | Harrison, Richard S. | Article in Book | | 1992 |
| Irish religious networks in colonial South Asia, ca. 1788-1858 | Crosbie, Barry | Article in Book | | 2015 |
| Irish Romanesque architecture | O'Keeffe, Tadhg | Article in Book | | 1998 |
| Irish round towers | Stalley, Roger | Monograph or Collective Volume | Country House | 2000 |
| Irish round towers | Barrow, Lennox | Monograph or Collective Volume | Eason | 1976 |
| Irish Round Towers: origins and purposes | McDonnell, Hector | Article in Journal | | 2018 |
| Irish saints' cults and ecclesiastical families | Ó Riain, Pádraig | Article in Book | | 2002 |
| Irish synchronistic poem on emperors and kings | Smith, Peter J. | Article in Journal | | 2012 |
| Irish tithes in British politics | Brynn, Edward | Article in Journal | | 1970 |
| Irish voices from the Spanish Inquisition : migrants, converts and brokers in early modern Iberia | O'Connor, Thomas | Monograph or Collective Volume | Palgrave Macmillan | 2016 |
| Irish wayside and churchyard crosses, 1600-1700 | King, H. A. | Article in Journal | | 1985 |
| Irland und Europa -Ireland and Europe. Die Kirche im Frühmittelalter - the early Church | | Monograph or Collective Volume | | 1984 |
| Irregular marriages in Dublin before 1837 : Church book for matrimony to the German church, Poolbeg Street, Dublin, 1806-1837 | | Monograph or Collective Volume | Dundalgan Press | 2015 |
| Is iad is abhar glóirithe dom | Ó Láimhín, Peadar | Article in Book | | 2000 |
| Isle of the saints : monastic settlement and Christian community in early Ireland | Bitel, Lisa M., 1958- | Monograph or Collective Volume | Cornell University Press | 1990 |
| Isolated in the wilderness : An archaeological exploration of nunneries in the medieval landscape of Ireland | Collins, Tracy | Article in Book | Four Courts Press | 2018 |
| Italian merchant bankers and the collection of papal revenues in Ireland in the thirteenth century | O'Sullivan, M. D. (Mary Donovan) | Article in Journal | | 1947 |
| J.J. O'Kelly, the Catholic Bulletin and contemporary Irish cultural historians | Murphy, Brian | Article in Journal | | 1989 |
| James Alypius Goold, O.S.A., first archbishop of Melbourne | Martin, F. X. (Francis Xavier), 1922-2000 | Article in Journal | | 1988 |
| James Charles McGuigan : first cardinal from English Canada | McGuigan, Peter | Article in Book | | 1988 |
| James Comerford (1817-1902) : rediscovering a Wexford-born Victorian stuccodore's art | Comerford, Patrick | Article in Journal | | 2012 |
| James Doyle (J.K.L.), bishop of Kildare and Leighlin, and the Roman Catholic relief movement, 1822-5 | Power, Conleth J. | Thesis | | 1968 |
| James Duhig | Boland, T. P. | Monograph or Collective Volume | University of Queensland Press | 1986 |
| James Murphy, bishop of Clogher, 1801-24 | Ó Dufaigh, Seosamh | Article in Journal | | 1968 |
| James Naughton, Bishop of Killala, 1911-1950 : the man, his life, in particular his laws | Rogan, Eddie | Article in Journal | | 1992 |
| James Ussher and the "Ussherian" episcopacy, 1640-16556: the primate and his 'Reduction' manuscript | Abbott, W. M. | Article in Journal | | 1990 |
| James Ussher and the creation of an Irish protestant identity | Ford, Alan, 1956- | Article in Book | | 1998 |
| James Ussher, archbishop of Armagh | Knox, Robert Buick | Monograph or Collective Volume | | 1967 |
| James Vaughan, Warden of Galway: ambition and achievement in Restoration Ireland | Gillespie, Raymond | Article in Journal | | 2020 |
| Jerpoint | Hegarty, Maureen | Article in Journal | | 1971 |
| Jerpoint Abbey, Co. Kilkenny | Leask, H. G. (Harold G.) | Monograph or Collective Volume | The Stationery Office | 1939 |
| Jewish heritage : Britain and Ireland. An architectural guide | Kadish, Sharman | Monograph or Collective Volume | Historic England | 2015 |
| John Allen Fitzgerald Gregg, archbishop | Seaver, George | Monograph or Collective Volume | Faith P.|Hodges Figgis | 1963 |
| John Archdeacon Begley : a concise biography | Begley, Donal | Monograph or Collective Volume | Donal Begley | 2017 |
| John Bramhall's other island : a Laudian solution to an Irish problem | Cunningham, Jack, 1964- | Article in Journal | | 2008 |
| John Bramhall's second Irish career 1660-3 | McCafferty, John | Article in Book | | 2009 |
| John Cardinal McCloskey | Mullan, Desmond | Article in Journal | | 1979 |
| John Colton, justiciar of Ireland (1382) and archbishop of Armagh (1383-1404) | Watt, J. A. | Article in Book | | 1981 |
| John Foxholes Franciscan Archbishop of Armagh 1471-74 | Millett, Benignus | Article in Journal | | 1999 |
| John Girvan for Christ and his Church | Lockington, John W. | Monograph or Collective Volume | Ambassador International | 2005 |
| John Henry Newman's Catholic university church in Dublin | Kane, Eileen | Article in Journal | | 1977 |
| John Hungerford Pollen and University Church | Curran, C. P. | Article in Book | | 1945 |
| John Lynch and renaissance humanism in Stuart Ireland: Catholic intellectuals, Protestant noblemen and the Irish 'Respublica' | Campbell, Ian W. S. | Article in Journal | | 2010 |
| John Lynch's history of the Irish bishops | Brady, John, d.1963 | Article in Journal | | 1945 |
| John MacEvilly, 1816-1902 | Bane, Liam | Thesis | | 1979 |
| John MacHale and John MacEvilly : conflict in the 19th century Catholic hierarchy | Bane, Liam | Article in Journal | | 1984 |
| John MacHale, archbishop of Tuam | Costello, Nuala | Monograph or Collective Volume | Talbot Press | 1939 |
| John MacHale, Henry Cooke and the curious demise of the confessional state in Ireland | Miller, David W. | Article in Book | | 2010 |
| John McHale and John MacEvilly : conflict in the nineteenth- century Catholic hierarchy | Bane, Liam | Article in Journal | | 1984 |
| John McHale, Archbishop of Tuam | Lyons, John | Article in Journal | | 1984 |
| John Semple and his churches | Craig, Maurice James | Article in Journal | | 1989 |
| John Thomas Troy, Archbishop of Dublin, 1786-1823 : a man of his times | O'Donoghue, Patrick | Article in Book | | 1990 |
| Jottings from Maynooth records | Scrutator | Article in Journal | | 1940 |
| Journey to reconciliation | Finlay, Finola | Article in Journal | | 2018 |
| Kells and its priory | Clyne, Miriam | Article in Book | | 2017 |
| Kells priory, c.1500: a fortified monastic house | Tietzsch-Tyler, Daniel | Article in Book | | 2017 |
| Kells Priory, Co. Kilkenny : archaeological excavations by T. Fanning and M. Clyne | Clyne, Miriam | Monograph or Collective Volume | Stationery Office | 2007 |
| Kerry's ancient see and shrine, Ardfert-Brendan | Nunan, Francis | Monograph or Collective Volume | Kerryman | 1950 |
| Kevin : a portrait of Archbishop Kevin McNamara | Power, Louis | Monograph or Collective Volume | [s.n.] | 1993 |
| Key concepts | Fitzpatrick, MargaretHartnett, Eoin,O'Riordan, TomásÓ Corráin, Donnchadh, | Article in Book | | 2011 |
| Kiladreenan and Newcastle | Ronan, Myles V. (Myles Vincent) | Article in Journal | | 1933 |
| Kilbrogan Church & Graveyard | Desmond, John | Article in Journal | | 2013 |
| Kilchreest Church and Graveyard | Dolan, Stephen | Article in Journal | | 2015 |
| Kilcolman parish registers, 1793-1814 & 1824-1900, County Kerry, Church of Ireland. with sections from Killorglin, Aglish, Kiltallagh, Knocknane, Molahiffe. | | Monograph or Collective Volume | John Spring & Louise Windeyer | 2003 |
| Kilcoo Parish Church, Bryansford | Countess of Roden, Clodagh | Monograph or Collective Volume | Mourne Observer [Printer] | 1971 |
| Kilcooley Abbey | Barrett, Maura | Monograph or Collective Volume | Sliabh Ardagh Rural Development | 2010 |
| Kilcooly Abbey. Part 1 | Columbkille, Fr. | Article in Journal | | 1984 |
| Kilcormac parish : celebrating 150 years of the Church of the Nativity of the B.V.M. | Kilcormac Parish Committee | Monograph or Collective Volume | Kilcormac Parish Committee | 2018 |
| Kildare : its history and antiquities | Murphy, Denis | Article in Journal | | 1899 |
| Kildare before the Normans : "an episcopal and conventual see" | Etchingham, Colmán | Article in Journal | | 2000 |
| Kildare Hall, the countess of Kildare's patronage of the Jesuits, and the liturgical setting of Catholic worship in early seventeenth-century Dublin | Loeber, RolfStouthamer-Loeber, Magda | Article in Book | | 2006 |
| Kildemock and its jumping church | MacIvor, Dermot | Monograph or Collective Volume | County Louth Archaeological Society | 2004 |
| Kilfenora (Feneborensis): a diocese apart | Mac Mahon, Michael | Article in Journal | | 2018 |
| Kilferagh, Co. Kilkenny: a medieval parish and its church | Manning, Conleth | Article in Journal | | 2012 |
| Kilkea church and rectory | Kane, Eamon | Article in Journal | | 2004 |
| Kilkeedy : a success story from a rural parish of the preservation of historic ruins | Hanley, Francis | Monograph or Collective Volume | Corcamore | 2001 |
| Kilkenny : its architecture and history | | Monograph or Collective Volume | An Taisce | 1977 |
| Kilkenny : past and present | Bradley, John, 1954-2014 | Article in Journal | | 2008 |
| Killadreenan Church revisited | Corlett, Christiaan | Article in Journal | | 2015 |
| Killala diocese : 1835-1839 | MacHale, E. | Article in Journal | | 1985 |
| Killala diocese in 1830-1831 | MacHale, E. | Article in Journal | | 1982 |
| Killala diocese in 1832 to 1834 | MacHale, E. | Article in Journal | | 1983 |
| Killala diocese, 1840-45 : the political background | MacHale, E. | Article in Journal | | 1986 |
| Killashee Church | Murphy, Denis | Article in Journal | | 1895 |
| Killeavy churches | Davies, Oliver | Article in Journal | | 1940 |
| Killeenbrenan Friary: Flag-ship house of the Franciscan Third Order in Ireland? | McDermott, Yvonne | Article in Journal | | 2012 |
| Killeshin and Sletty | Comerford, M., P.P. | Article in Journal | | 1883 |
| Killeshin church and its Romanesque ornament | Crawford, H. S.Leask, H. G. (Harold G.) | Article in Journal | | 1925 |
| Killinagh Church and Crom Cruaich | Davies, Oliver | Article in Journal | | 2013 |
| Killinchy parish church | Rudnitzky, Honor | Monograph or Collective Volume | Parish of Killinchy Union | 1980 |
| Kilmainham of the woody hallow : a history of Kilmainhamwood for the centenery of the church of the Sacred Heart, Kilmainhamwood (1898-1998) | Cusack, Danny | Monograph or Collective Volume | Kilmainhamwood Parish Council | 1998 |
| Kilmallock Dominican priory : an architectural perspective, 1291-1991 | Hogan, Arlene | Monograph or Collective Volume | | 1991 |
| Kilmoe church | Snodgrass, Lee | Article in Journal | | 1994 |
| Kilmore churches | Galloghy, Dan | Article in Journal | | 1994 |
| Kilmore parish in 1833 | [Paterson] | Monograph or Collective Volume | [Kilmore parish] | 1833 |
| Kilnasoolagh church, Newmarket on Fergus : an appreciation | Bailey, Edwin R. | Monograph or Collective Volume | The author | 1992 |
| Kilpeacon parish church, Kilpeacon, Crecora, Co. Limerick, 1690-1900 | Johnston, Niall | Monograph or Collective Volume | [Niall Johnston] | 1990 |
| Kiltenanlea Parish Church and its community, Clonlara, Co. Clare, 1782-1992 | Bourke, Fred | Monograph or Collective Volume | Clonlara Development Association | 1992 |
| Kiltennel Chapel and Graveyard | Ivers, Bobby | Article in Journal | | 2024 |
| Kiltennel Church, Gorey, Co. Wexford | Spencer, Kevin | Article in Journal | | 1988 |
| Kiltoom church and graveyard | Ryan, Hazel A. | Article in Journal | | 1998 |
| King Guaire and Bishop Cellach | Knox, H. T. (Hubert Thomas) | Article in Journal | | 1902 |
| Kingston College : Mitchelstown, County Cork, 1761-2011 | St Leger, Alicia | Monograph or Collective Volume | Kingston Charity Trust | 2011 |
| Kingstown Congregational Church | ffeary-Smyrl, Steven | Article in Journal | | 1993 |
| Kingstown Congregational Church | ffeary-Smyrl, Steven | Article in Journal | | 1994 |
| Kinsale to Benburb - a valuable breathing space in Irish history | Olden, Michael | Article in Book | | 1971 |
| Knock - A sacred place in the west of Ireland where heaven and earth meet | Quinn, Joseph | Article in Book | | 2012 |
| Knock Methodist Church : 100 years. 1870-1970 | Connell, Noel | Monograph or Collective Volume | E. Hoggett Ltd | 1969 |
| L'architecture religieuse en France à l'époque gothique | Lasteyrie, R. de | Monograph or Collective Volume | [s.n.] | 1927 |
| L'architecture religieuse en France à l'époque romane : ses origines, son développement | Lasteyrie, R. de | Monograph or Collective Volume | [s.n.] | 1929 |
| L'hagiographie franconienne dans quelques publications récentes | Coens, Maurice | Article in Journal | | 1953 |
| L'rlanda e gli irlandesi nell'alto medioevo | Lapidge, Michael | Article in Book | | 2010 |
| La bibliothèque du Collège des Irlandais et son fonds de livres ancien | Caillet, Maurice | Article in Journal | | 1991 |
| La diocesi di Armagh e l'arcivescovo Fiorentino Ottaviano del Palagio, 1480-1513, incluso un regesto del suo registro arcivescovile [The diocese of Armagh and the Florentine archbishop Octavian de Palatio, 1480-1513, including a calendar of his archiepiscopal register] | Sughi, Mario | Thesis | | 1996 |
| La trasmissione e rielaborazione dell'esegesi Patristica nella letterature Ibernica delle origini | Castaldi, Lucia | Article in Book | | 2010 |
| Ladychapel, 1863-2013 | Edwards, Rita | Monograph or Collective Volume | Maynooth Local History Group | 2013 |
| Lambeg churchyard, Lisburn, Co. Antrim. Inscriptions on old tombstones (1627-1837) and on those of special interest up to the present day, with notes | Cassidy, William | Monograph or Collective Volume | [Lambeg Parish Church] | 1937 |
| Land of my fathers : 2000 years of Welsh history | Evans, Gwynfor ; Garlick, K. | Monograph or Collective Volume | NA | 1992 |
| Landscape of spires | Brewer, John D.,Keane, Margaret C.,Livingstone, David N. | Article in Book | | 2006 |
| Lanfranc and the Irish church | Gwynn, Aubrey | Article in Journal | | 1941 |
| Laser scanning of the inscribed Hiberno-Romanesque arch at Monaincha, Co. Tipperary, Ireland | Murphy, Orla | Article in Book | | 2011 |
| Late medieval Brugh na Bóinne, 1142-1541 | Kenny, Gillian | Article in Book | | 2008 |
| Late medieval friaries in Sligo : history and architecture | McDermott, Yvonne | Article in Book | | 2024 |
| Late twelfth-century church construction : evidence of parish formation? | Ní Ghabhláin, Helen | Article in Book | | 2006 |
| Lattice-works, open and closed : some reflections on diocesan archives | Silke, John J. | Article in Journal | | 1990 |
| Laurence O'Toole - the lost leader | Tracy, Frank | Article in Journal | | 2006 |
| Law and the disestablished Church of Ireland: fifty years of accelerating change | Colton, Paul | Article in Book | | 2019 |
| Lay Catholicism and religious policy in Cromwellian Ireland | Cunningham, John, 1984- | Article in Journal | | 2013 |
| Lay female piety and church patronage in late medieval Ireland | Lyons, Mary Ann | Article in Book | | 2002 |
| Le Concile Vatican II: étape essentielle dans le processus d'ouverture de l'Eglise catholique d'Irlande | Beaugé de La Roque, Pauline | Article in Journal | | 2013 |
| Le problème de Pélage | De Plinval, G. | Article in Journal | | 1939 |
| Leap Parochial Hall : the first fifty years - a potted history | O'Donovan, John | Article in Journal | | 2014 |
| Learning from the past | Maher, Michael | Article in Book | | 1981 |
| Lease of the Friary of Crevalea (Dromahaire) in County Leitrim to Owen Wynne, 1 April 1658 | Millett, Benignus | Article in Journal | | 1999 |
| Lecture on the history of Ardagh | McNamee, James Joseph | Article in Journal | | 1940 |
| Leighlin diocese : its ancient boundaries and divisions | O'Toole, Edward | Monograph or Collective Volume | St Mary's College, Knockbeg | 1936 |
| Leon an Iarthair : aisti ar Sheán Mac Héill, Ardeaspag Thuama 1834-1881 | | Monograph or Collective Volume | Clóchomhar | 1983 |
| Les débuts de l'art cistercien en Irlande d'après les vestiges des abbayes de Mellifont (Louth) et de Baltinglass (WIcklow) | Beuer-Szlechter, H. V. | Article in Journal | | 1970 |
| Les diocèses d'Irlande jusqu'au XVe siècle | Millett, Benignus | Article in Journal | | 1985 |
| Les eglises de Belfast pendant la second guerre mondiale | Goldring, Maurice | Article in Journal | | 1991 |
| Les influences irlandaises sur l'architecture religieuse bretonne du haut moyen âge à l'époque romane : mythe ou réalité? | Guigon, Philippe | Article in Book | | 1994 |
| Letter from John Sloane relating to the treatment of memorials, 'Irish Builder', 15th October 1878 | Sloane, John, fl. 1878 | Article in Book | | 2000 |
| Letter from William George Black relating to the treatment of memorials, 'Irish Builder', 1st October 1878 | Black, William George, fl. 1878 | Article in Book | | 2000 |
| Letter of Pope Innocent VIII, 4 December 1488 | Anonymous | Article in Book | | 1991 |
| Letters on Armagh parish two centuries ago | Ó Fiaich, Tomás | Article in Book | | 2013 |
| Lewis Prytherch's manuscript | | Article in Journal | | 1945 |
| Libelli et commentarii aliorum : the Hibernensis and the Breton bishops | Flechner, Roy | Article in Book | | 2008 |
| Librán as monastic archetype | Ritari, Katja | Article in Book | | 2015 |
| Life in the Church of Ireland, 1600-1800 | Wyse Jackson, Robert | Monograph or Collective Volume | Ballinakella Press | 2018 |
| Life of Blessed Oliver Plunkett, archbishop of Armagh (1625-1681) | Stokes, John F. B. | Monograph or Collective Volume | Catholic Truth Society | 1954 |
| Life of St Finbarr : founder and patron of the city and diocese of Cork | O'Brien, C. M. | Monograph or Collective Volume | Killarney Printing Works | 1985 |
| Life of St Lawrence O'Toole, archbishop of Dublin, 1128-1180 | Legris, Albert | Monograph or Collective Volume | Catholic Truth Society | 1914 |
| Light from the bridge : a record of the priests, sisters & brothers of our parish of Rochfortbridge, barony of Fartullagh, diocese of Meath | Wright, Kathleen | Monograph or Collective Volume | Parish of Rochfortbridge | 2003 |
| Light on the past : story of St Mary's Parish, Limerick | Connellan, Brendan | Monograph or Collective Volume | St Mary's Parish, Limerick | 2021 |
| Lilcach: the origins and organisation of an early medieval monastery | Leigh, JoannaÓ Drisceoil, Cóilín | Article in Journal | | 2017 |
| Limerick and south-west Ireland : medieval art and architecture | | Monograph or Collective Volume | Maney for the British Archaeological Association | 2011 |
| Limerick cathedral registers 1826 to 1842: I|Limerick cathedral registers 1826 to 1842: II|Limerick cathedral registers 1826 to 1842: III|Limerick cathedral registers 1826 to 1842: IV | Manning, Peter FIGRS | Article in Journal | | 2019 |
| Limerick, Killaloe, and Kells, 1194-1250 | | Article in Journal | | 1977 |
| Links with the past | Marks, Bernadette | Article in Journal | | 2013 |
| Lintels from lasers: copying the crucifixion stone-carving at Maghera Old Church, County Londonderry | Fry, Malcolm F.Martin, Alan H. | Article in Journal | | 2000 |
| Liosta deoisí ón 17ú céad | Ó Cíobháin, Breandán | Article in Journal | | 1977 |
| Lisburn Cathedral and its past rectors | Carmody, W. P., Rev. | Monograph or Collective Volume | R. Carswell & Son | 1923 |
| Lisburn's rich church heritage : churches and places of worship in the Lisburn city area | Kelly, John Andrew | Monograph or Collective Volume | Impression Print and Design | 2009 |
| Lismore and Cashel : reflections on the beginnings of Romanesque architecture in Munster | O'Keeffe, Tadhg | Article in Journal | | 1994 |
| Lismore and Cashel : reflections on the beginnings of Romanesque architecture in Munster | O'Keeffe, Tadhg | Article in Journal | | 1994 |
| List of ancient churches, graveyards, castles, wells etc. shown on a map of co. Wexford Ordnance Survey 1840 | Ua Dubhghaill, Seumas | Article in Journal | | 1925 |
| List of documents transferred from Armagh Diocesan Registry to the Public Record Office, Dublin | | Article in Journal | | 1915 |
| Little-known drawings of Glendalough, c.1777-1850 | Harbison, Peter | Article in Book | | 2011 |
| Liturgy and music in the medieval cathedral | Fletcher, Alan J. | Article in Book | | 2009 |
| Living stones : a historical survey of the churches of the dioceses of Derry and Raphoe | Crooks, D. W. T. | Monograph or Collective Volume | The author | 2001 |
| Living with the church in early-medieval Ireland, AD 400-1100 : archaeological perspectives on the sacred and profane | Harney, Lorcan | Thesis | | |
| Locating "Mag itir dá glais": a church site in Machae | Ó Mainnín, Mícheál B. | Article in Journal | | 2010 |
| Longford priories and their manuscripts : All Saints and Abbeyderg | Ó Riain, Pádraig | Article in Book | | 2010 |
| Lord Inchiquin and the Munster clergy, 1643-9 | Little, Patrick | Article in Book | Four Courts Press | 2025 |
| Lough Carra, Co. Mayo. Part 1 (The prehistoric settlement); Part 2 (The medieval and post-medieval settlement) | White, Fiona | Article in Journal | | 2011 |
| Loughgall: a plantation parish | Reilly, Pat | Monograph or Collective Volume | Trimprint | 1995 |
| Lurgan Parish, Virginia: a parish history | Kingston, Robert | Monograph or Collective Volume | [Lurgan parish, Virginia] | 1988 |
| Macnamara's Irish colony and the United States taking of California in 1846 | Fox, John | Monograph or Collective Volume | McFarland | 2000 |
| Mael Muire Ua Dúnáin (1040-1117), reformer | Ó Corráin, Donnchadh | Article in Book | | 1983 |
| Magheragall parish church. Centenary celebration, June 6th and 7th, 1931 | | Monograph or Collective Volume | Herald Office (printer) | 1931 |
| Mainistir na Tríonóide ró-naofa, Baile Átha Cliath sa 14ú céad | Mac Giolla Phádraig, Brian | Article in Journal | | 1960 |
| Majestic shrines and graceful sanctuaries : the church architecture of Patrick Byrne, 1783-1864 | Grimes, Brendan | Monograph or Collective Volume | Irish Academic | 2009 |
| Major ecclesiastical libraries : from Reformation to Civil War | Barr, C. B. L.Selwyn, David | Article in Book | | 2006 |
| Making Christian landscapes in Atlantic Europe : conversion and consolidation in the early Middle Ages | | Monograph or Collective Volume | Cork University Press | 2016 |
| Mallow Church of Ireland parish records | Sheehan, Deidre | Article in Journal | | 1989 |
| Mallow parochial records | Sheehan, Deidre | Article in Journal | | 1988 |
| Mallow Work House Altar | Crowley, Seamus | Article in Journal | | 2015 |
| Malone, Belfast : the early history of a suburb | Carleton, T. | Article in Journal | | 1978 |
| Manorhamilton parish church 1783-1983 : glimpses of our history | Anonymous | Monograph or Collective Volume | [s.n.] | 1983 |
| Manx church origins | Dugdale, D. S. | Monograph or Collective Volume | Llanerch | 1998 |
| Manx kingship in its Irish sea setting, 1187-1229 : King Rognvaldr and the Crovan dynasty | McDonald, Russell Andrew | Monograph or Collective Volume | Four Courts | 2007 |
| Marginalia in Bishop Downham's 'description of the diocese of Derry' | | Article in Journal | | 1943 |
| Mary Aikenhead (1787-1858), servant of the poor : founder of the Religious Sisters of Charity | Blake, Donal | Monograph or Collective Volume | Caritas | 2001 |
| Mass-houses and meeting houses: Catholic and Presbyterian church design in eighteenth-century Ireland | McCormick, Finbar | Article in Book | Four Courts Press | 2018 |
| Matthew Gibney (1837-1925), bishop of Perth, Western Australia | Mitchell, Kilian J. | Article in Journal | | 2001 |
| Meath history and society : Interdisciplinary essays on the history of an Irish county | | Monograph or Collective Volume | Geography Publications | 2015 |
| Medieval Britain in 1978, 2 : post-Conquest | Cherry, J. | Article in Journal | | 1979 |
| Medieval burial and pilgrimage within the landscape of Glendalough : the evidence of the crosses and cross-slabs | Harney, Lorcan | Article in Book | | 2011 |
| Medieval church sites of north Dublin : a heritage trail | McMahon, Mary | Monograph or Collective Volume | Office of Public Works | 1991 |
| Medieval churches | Downey, LiamO'Sullivan, Muiris | Article in Journal | | 2017 |
| Medieval collections of ecclesiastical and devotional materials : Leabhar Breac, Liber Flavus Fergusiorum and The Book of Fenagh | Herbert, Máire | Article in Book | | 2009 |
| Medieval Dublin XVIII | | Monograph or Collective Volume | Four Courts | 2020 |
| Medieval ecclesiastical buildings in Ireland, 1789-1915 : building on the past | NicGhabhann, Niamh | Monograph or Collective Volume | Four Courts | 2015 |
| Medieval ecclesiastical metalwork from the diocese of Clogher | Bourke, Cormac | Article in Book | | 2005 |
| Medieval fonts | Pike, H. K. J. | Article in Journal | | 1989 |
| Medieval fonts in Kildare | Pike, H. K. J. | Article in Journal | | 1987 |
| Medieval fonts of Ireland | Pike, H. K. J. | Monograph or Collective Volume | The author | 1989 |
| Medieval Fore, County Westmeath | Masterson, Rory | Monograph or Collective Volume | Four Courts | 2014 |
| Medieval improvements: the extension of Moyne friary's tower | McDermott, Yvonne | Article in Journal | | 2013 |
| Medieval Irish buildings, 1100-1600 | O'Keeffe, Tadhg | Monograph or Collective Volume | Four Courts | 2015 |
| Medieval Mayo : churches and abbeys | Harbison, Peter, 1939-2023 | Monograph or Collective Volume | Mayo County Council | 2023 |
| Medieval Navan | Cantwell, Ethna | Article in Journal | | 2011 |
| Medieval parish churches in Muintir Eolais, south County Leitrim | Scully, Siobhán | Article in Book | | 2019 |
| Medieval parish churches of north east Clare | O'Reilly, Fiona | Article in Journal | | 1997 |
| Medieval record sources | Connolly, Philomena | Monograph or Collective Volume | Four Courts | 2002 |
| Medieval state-building and the churches of the Celtic fringe | Jones, W. R. | Article in Journal | | 1974 |
| Meelick Friary's hidden history | O'Keeffe, Tadhg | Article in Journal | | 2019 |
| Mellifont abbey : architecture and history | Stalley, Roger | Article in Book | | 2023 |
| Mellifont Abbey : some observations on its architectural history | Stalley, Roger | Article in Journal | | 1975 |
| Mellifont abbey : some observations on its architectural history | Stalley, Roger | Article in Journal | | 1975 |
| Mellifont Abbey in the County of Louth : its rise and downfall | B., K. F.
| Monograph or Collective Volume | Hodges Figgis | 1890 |
| Members' column. Old Mayglass | Browne, Kathleen A. | Article in Journal | | 1921 |
| Memoir of the Armagh Cathedral, with an account of the ancient city | Rogers, Edward | Monograph or Collective Volume | W. and G. Baird [printer] | 1882 |
| Memoir of the Church of St. Duilech in the Diocese of Dublin : commonly called 'Saint Doulagh's' containing a paper read before the Royal Irish Acadamy on Monday, April 11, 1859 | Reeves, William | Monograph or Collective Volume | Dublin University Press | 1859 |
| Memorial plaques and windows in Blarney and District churches : 5. St Patrick's Catholic Church, Whitechurch | Gabriel, Brian | Article in Journal | | 2015 |
| Memorial plaques and windows in Blarney and District churches : 6. St. Peter's Church of Ireland, Carrigrohane | Synnott, Chris | Article in Journal | | 2015 |
| Memorial plaques and windows in Blarney and district churches : St Mary's Church, Waterloo | Gabriel, Brian | Article in Journal | | 2011 |
| Memorial plaques and windows in Blarney and district churches : St Senan's Church, Cloghroe | Synnott, Chris | Article in Journal | | 2011 |
| Memorials of Whitechurch graveyard and church | Walsh, Joe | Article in Journal | | 2015 |
| Memorials of Youghal, ecclesiastical and civil | Hayman, Rev. Canon | Monograph or Collective Volume | John Lindsay | 1879 |
| Memories of loyalty - St. Bridget's Glassdrummond | Kieran, Tony | Article in Journal | | 1990 |
| Memory, belief and identity : remembering the dead on Iniscealtra, Co. Clare | O'Leary, Clíodhna | Article in Book | | 2015 |
| Mendicant cloisters in Munster | O'Donoghue, Aisling | Article in Book | | 2011 |
| Methodist centenary church, St. Stephen's Green, Dublin: a commemorative record | Bradshaw, D. B. (David Bigham) | Monograph or Collective Volume | | 1943 |
| Methodist records in Ireland | Kelly, Marion | Article in Book | | 1992 |
| Metropolitan ambitions and politics : Kells-Mellifont and Man & the Isles | Beuermann, Ian | Article in Journal | | 2002 |
| Michael Cardinal Logue 1840-1924, part 2 | Walsh, Aisling | Article in Journal | | 1999 |
| Michael Cardinal Logue 1840-1924, Part IV - 'A Catholic ethos for a Catholic society' | Walsh, Aisling | Article in Journal | | 2005 |
| Michael Hewetson, M.A., Archdeacon of Kildare for a day (St. Peter's, 1686) | Hewetson, John | Article in Journal | | 1911 |
| Michael Jones and the survival of the Church of Ireland, 1647-9 | Little, Patrick | Article in Journal | | 2019 |
| Michael Peter MacMahon : bishop of Killaloe, June 5, 1765 - Februray 20, 1807 | Clancy, J. J. | Article in Journal | | 1940 |
| Michael, Cardinal Logue, 1840-1924 | Walsh, Aisling | Thesis | | 1996 |
| Mid-twentieth-century architectonics of Catholic Dublin | Rowley, Ellen | Article in Book | | 2020 |
| Middle ages | Stalley, Roger | Article in Book | | 2000 |
| Military background to the Lutheran church in Marlborough Street, Dublin | Ferguson, Kenneth | Article in Journal | | 1998 |
| Minutes of the vestry for the parish of Dundalk, 1803-6 | Anonymous | Article in Journal | | 1938 |
| Miscellanea : Interesting feature at Temple Muireguidan | McCloskey, Morgan | Article in Journal | | 2001 |
| Miscellanea. 4. A Catholic map of Ireland, 1859 | Herity, Michael | Article in Journal | | 2012 |
| Miscellanea. An early reference to St Olave's Church in Dublin | Manning, Conleth | Article in Journal | | 2009 |
| Miscellanea. Kilfenora Cathedral | O'Neill, Michael | Article in Journal | | 2013 |
| Miscellanea. Rediscovery at Killashee | McCabe, Brian | Article in Journal | | 2009 |
| Miscellanea. The Bann Bell-shrine crest : a note on its provenance and inspiration | Murray, GriffinÓ Riain, Pádraig | Article in Journal | | 2006 |
| Miscellaneous documents : 2, 1625-40 | | Article in Journal | | 1949 |
| Miscellaneous papers | | Article in Journal | | 1951 |
| Misericords : with special reference to those in St. Mary's Cathedral, Limerick | Haydn, J. A. | Monograph or Collective Volume | McKern's Printers | [1940?] |
| Missions and missionaries | Conlan, Patrick, 1940- | Article in Book | | 2009 |
| Mister, are you a priest? : jottings by Bishop Edward Daly | Daly, Edward | Monograph or Collective Volume | Four Courts | 2000 |
| Mit dem hl. Virgil durch die Jahrhunderte der Kunst | Locicnik, Raimund A. | Article in Book | | 1985 |
| Mixed education and the synod of Ulster, 1831-40 | Ó Raifeartaigh, T. | Article in Journal | | 1955 |
| Mochta of Louth and the reworking of Irish history | Cronin, Anthony | Article in Book | | 2021 |
| Moira parish church, 1722-1972 | McCarthy, John | Monograph or Collective Volume | Lithoforme [Printers] | 1973 |
| Monaghan cathedral | Duffy, Joseph | Monograph or Collective Volume | Eason | 1992 |
| Monasterevan - Abbey and Parish | Comerford, M., C.C. | Article in Journal | | 1879 |
| Monasteries and society in the British Isles in the later middle ages | | Monograph or Collective Volume | Boydell | 2008 |
| Monastic ecclesial reforms and its impact on the early development of the Irish churches | Ocampo-Gooding, Sonya | Article in Journal | | 2009 |
| Monastic Europe : medieval communities, landscapes and settlement | | Monograph or Collective Volume | Brepols | 2019 |
| Monastic life in the medieval British Isles : essays in honour of Janet Burton | | Monograph or Collective Volume | University of Wales Press | 2018 |
| Monastic sites in the West of Ireland | O'Kelly, M. J. (Michael Joseph) | Article in Journal | | 1974 |
| Monasticism in Ireland, AD 900-1250 | Bhreathnach, Edel | Monograph or Collective Volume | Four Courts Press | 2024 |
| Money and Irish Catholicism : an intimate history, 1850-1921 | Roddy, Sarah | Monograph or Collective Volume | Cambridge University Press | 2025 |
| Monkstown : a Victorian village | Cannon, Séamus,Cullen, Carole | Monograph or Collective Volume | Blackrock Education Centre | 2014 |
| Monster and monastery : St Kevin's Lives and the expansion of Glendalough | Lacey, Brian | Article in Book | | 2011 |
| Moravian records for Crossard, County Clare | Power, Rosemary | Article in Journal | | 2013 |
| More on Carlingford churches in 1485 | Gillespie, Raymond | Article in Journal | | 2012 |
| Most Rev. Thomas McDonnell bishop of Killala, Dec. '70 - Jan. '87 : a personal tribute by Rt. Rev. P. Gallagher P.P., V.G. Crossmolina | Gallagher, Patrick | Article in Journal | | 1988 |
| Mountshannon 1800-1845 | Madden, Gerard | Article in Book | | 1993 |
| Mouthing obscenities, Christological typologies? complexities of meaning at Dysert O'Dea | Ní Ghrádaigh, Jenifer | Article in Book | | 2011 |
| Moyne and Rosserk : ways of being Fransician in the late medieval period | McDermott, Yvonne | Article in Journal | | 2017 |
| Mr Craghead takes communion | Gillespie, Raymond | Article in Book | | 2012 |
| MS material for diocesan and parochial history : report on the collections of sources : 2 | Ó Fiaich, Tomás | Article in Journal | | 1955 |
| MS material for diocesan and parochial history, report on collections of sources : 1 | Representative Church Body, Dublin | Article in Journal | | 1954 |
| Muintir Eolais chalice returns to its roots | | Article in Journal | | 2023 |
| Muircheartach Ó Domhnalláin, easbog Chluain Fearta, 1695-1706 | Mac Fhinn, Pádraig Eric, 1895-1987 | Article in Journal | | 1953 |
| Mullabrack : a parish of great antiquity | McHugh, Mary | Monograph or Collective Volume | Trimprint (printer) | 2012 |
| Mullaghbrack | Noel, F. A. | Article in Journal | | 1989 |
| Mulrankin Church of Ireland items | Hemingway, Ken | Article in Journal | | 2007 |
| Murchú's Armagh | Lynn, C. J.McDowell, J. A. | Article in Journal | | 1988 |
| Murrisk abbey, Co. Mayo | Leask, H. G. (Harold G.) | Article in Journal | | 1943 |
| Murrisk Friary : a late medieval house of the Augustinian Friars | McDermott, Yvonne | Article in Journal | | 2008 |
| Music before the Guinness restoration, 1750-1860 | Houston, Kerry | Article in Book | | 2009 |
| Music in the Church of Ireland | Houston, Kerry | Article in Book | | 2019 |
| My Foster ancestors in Dublin | Barry, Eleanor | Article in Journal | | 2002 |
| My great-uncle's mathematical conundrums | Farry, Neal | Article in Journal | | 2017 |
| Na paidreacha dúchais | Ó Héalaí, Pádraig | Article in Book | | 1979 |
| Naas: an historical sketch | Comerford, M., P.P. | Article in Journal | | 1883 |
| National identity, classical tradition, christian reform and colonial expansion at the ends of the earth : an analysis of the Swedish and Norwegian peoples in Adam of Bremen's history of the archbishops of Hamburg-Bremen and the Irish in Gerald of Wales's topography of Ireland | Forde, Britt | Thesis | | 2016 |
| Neueste archäologische Untersuchungen im Schottenkloster | Codreanu-Windauer, Silvia | Article in Book | | 2005 |
| New altars for Castlebridge : Church People Newspapers, Saturday 5th November 1898 | Anonymous | Article in Book | | 2005 |
| New church of St Malachy's | Ó Muirí, Réamonn | Article in Book | | 2013 |
| New insights into the church known as St Crispin's Cell and the site of Rathdown Castle, Co. Wicklow | Burbridge, MarieCoyne, FrankDuffy, PaulHarrington, JohnLove, ColinMogensen, Ejvind | Article in Journal | | 2017 |
| New Ireland, new church | Martin, Diarmuid | Article in Journal | | 2011 |
| New light on the beginnings of Christ Church cathedral, Dublin | Ó Riain-Raedel, Dagmar | Article in Book | | 2019 |
| New Ross = Rosponte = Ros Mhic Treoin : an anthology celebrating 800 years | | Monograph or Collective Volume | Wexford County Council Public Library Service for New Ross Celebrations | 2007 |
| New survey of Clare Island, Vol. 4 : the abbey | | Monograph or Collective Volume | Royal Irish Academy | 2005 |
| Newman House and University Church | Curran, Constantine Peter | Monograph or Collective Volume | University College | 1953 |
| Newman's university church : a history and guide | Gaughan, J. Anthony, 1932- | Monograph or Collective Volume | Kingdom Books | 1997 |
| Newmen's University Church : a history and guide | Gaughan, J. Anthony, 1932- | Monograph or Collective Volume | Kingdom Books | 1997 |
| Nicholas Conaty, bishop of Kilmore, (1865-1886) | Kelly, Gabriel | Article in Journal | | 1987 |
| Nicholas Mac Maol Íosa, archbishop of Armagh (1272-1303) | Gwynn, Aubrey | Article in Book | | 1995 |
| Nicholas Wiseman, ecclesiastical politics and Anglo-Irish relations in the mid nineteenth century | Rafferty, Oliver P. | Article in Journal | | 1993 |
| Nineteenth-century architectural restorations | O'Neill, Michael | Article in Book | | 2009 |
| Nineteenth-century stained glass in the Church of Ireland diocese of Limerick and Killaloe | Lawrence, David | Article in Journal | | 2007 |
| Nineteenth-century travellers to Early Christian Sites in Co. Kerry | Okasha, Elisabeth | Article in Book | | 2007 |
| Ninety candidates proposed for Irish dioceses, c. 1665 | Millett, Benignus | Article in Journal | | 1955 |
| No words can tell our sorrow. A tribute to the late Cardinal Ó Fiaich | Kearns, Patrick | Article in Journal | | 1990 |
| Nobber : an important early medieval ecclesiastical site | King, Heather | Article in Journal | | 2007 |
| Norman splendour : Duiske Abbey, Graignamanagh | Carvill, G. | Monograph or Collective Volume | Blackstaff Press | 1979 |
| North Strand Church : a memoir 1838-1938 | Tyndall, Charles | Monograph or Collective Volume | North Strand Church | 1938 |
| Northern Ireland : the afterlife of monastic buildings | Brannon, N. F. (Nick)Hamlin, Ann | Article in Book | | 2003 |
| Northern Ireland and the Cold War, 1945 to 1972 | Goss, Stephen J. | Thesis | | |
| Not well covered. A Romanesque remnant hiding in plain sight in County Kilkenny | Corlett, Chris | Article in Journal | | 2021 |
| Nóta fán triúr príomháid de mhuintir Mhic Mhathghamhna | Ó Maolagáin, Pádraig | Article in Journal | | 1947 |
| Note on the church of St. Michan, Dublin | Lawlor, H. J. (Hugh Jackson), 1860-1938 | Article in Journal | | 1926 |
| Note. St Munchin's and the Bishop's Palace | Hodkinson, Brian | Article in Journal | | 2013 |
| Note: A ghost worrd detected on the seventeenth-century font at St Anne's Church, Shandon, Cork | Hawtree, Richard | Article in Journal | | 2013 |
| Note: All Saints, Drimoleague: clarifications and new discoveries | Butler, Richard J. | Article in Journal | | 2016 |
| Notes & Documents. Ecclesiastical affairs in Armagh in the ninth and tenth centuries | Mac Airt, Seán | Article in Journal | | 2015 |
| Notes and Documents. A community in stone: Launch of 'Funerary Monuments and memorials' by James Stevens Curl, St Patrick's Cathedral, Armagh, 2 November 2013 | Dunstan, Gregory, Dean | Article in Journal | | 2014 |
| Notes and Documents. Launch of 'A People's Church' by Liam Swords, St Nathy's College, Ballaghaderreen, 28 February 2014 | Ó Muraile, Nollaig | Article in Journal | | 2014 |
| Notes and jottings concerning the parish of Charlestown Union in the county of Louth: being an outline of the history of the parishes of Charlestown and Clonkeen with brief references to the parishes of Clonkeehan, Mapastown, Philipstown and Tallanstown, now included in the Union | L'Estrange, Guy W. C., Rev. | Monograph or Collective Volume | 'Printed at the Rectory Press' [for private circulation. Not published] | 1912 |
| Notes and Queries. Some notes on the history of Whitechurch | McCabe, Brian | Article in Journal | | 2019 |
| Notes and records of the ancient religious foundations at Youghal, Co. Cork, and its vicinity | Hayman, Samuel, Rev. | Monograph or Collective Volume | John Lindsay | 1859 |
| Notes of the history of the diocese of Dromore | Keenan, Patrick | Article in Journal | | 1989 |
| Notes on an uninscribed monument in St Canice's Cathedral, Kilkenny | Hogan, J. | Article in Journal | | 1879 |
| Notes on monastic archaeology and the Annals of Ulster, 650-1050 | MacDonald, Aidan | Article in Book | | 1981 |
| Notes on mural graves found in the foundations of the chancel of St.Brigid's cathedral church, Kildare, in 1891 | Cowell, George Young | Article in Journal | | 1902 |
| Notes on some associated families | Madden, Gerard | Article in Book | | 1993 |
| Notes on some Irish altar-plate | Moran, Patrick | Article in Journal | | 1946 |
| Notes on the ancient churches and castles of Ballybur and Inchihologhan | Hogan, John | Article in Journal | | 1883 |
| Notes on the antiquities of the united parishes of Ballycallan, Kilmangh and Killaloe | Holahan, J., C.C. | Article in Journal | | 1883 |
| Notes on the church plate of Waterford diocese | Warren, C. B. | Article in Journal | | 1967 |
| Notes on the early history of the dioceses of Tuam, Killala and Achonry | Knox, H. T. (Hubert Thomas) | Monograph or Collective Volume | Hodges, Figgis . | 1904 |
| Notes on the history of the Church and Parish of S. Bartholomew | Longworth-Dames, R. S. | Monograph or Collective Volume | Church of Ireland Printing and Publishing Co. | 1908 |
| Notes respecting the Church of St. Peter, parish of Ballymodan, and County of Cork | | Monograph or Collective Volume | Printed by the Boys of the Door-Step Brigade | 1874 |
| Notes, antiquarian and historical, on the parish of Clane | Sherlock, Canon | Article in Journal | | 1895 |
| Notes. Some evidence for a possible roiund tower at Noughaval, Co. Clare | Ó Murchadha, Seán (1923-1995) | Article in Journal | | 2017 |
| Notes. The old Methodist Preaching-House in Adare | Spillane, Milo | Article in Journal | | 2008 |
| Notes. The old Methodist Preaching-House in Adare | Spillane, Milo | Article in Journal | | 2008 |
| Notes. The Wesleyan Chapel at the Curragh, 1860 | Ferguson, Kenneth | Article in Journal | | 2021 |
| Notices of ecclesiastical ruins | Healy, William | Article in Journal | | 1879 |
| Nun's Cross church, Co. Wicklow and its treasures, 1817-2017 | Butler, Patricia | Monograph or Collective Volume | Killiskey Select Vestry | 2016 |
| Obligationes pro annatis diocesis Rossensis. [1432-1533] | | Article in Journal | | 1970 |
| Observations on Saint John's Church, Buttevant | Power, Bill | Article in Journal | | 2003 |
| Of faith and fatherland : churches and states in Ireland from the Act of Union to the Belfast Agreement, 1800-1998 | Ó Corráin, Daithí | Article in Book | | 2023 |
| Of Saxons, a Viking and Normans : Colmán, Gerald and the monastery of Mayo | Ní Mhaonaigh, Máire | Article in Book | | 2009 |
| Oilibhéar Pluincéid | Ó Fiaich, Tomás | Monograph or Collective Volume | Foilseacháin Ábhair Spioradálta | 1976 |
| Old chruches in the parish of Rossinver, county Leitrim | Davies, Oliver | Article in Journal | | 2013 |
| Old church of Ballinacourty, Barony of Dunkellin | Redington, M. | Article in Journal | | 1915 |
| Old church plate of Kilkenny city | Jackson, Robert Wyse | Article in Journal | | 1951 |
| Old church plate of Lismore Diocese | Jackson, Robert Wyse | Article in Journal | | 1955 |
| Old church silver of east Killaloe | Jackson, Robert Wyse | Article in Journal | | 1940 |
| Old churches in county Louth : Drogheda barony | Davies, Oliver | Article in Journal | | 1947 |
| Old churches in the parish of Rossinver, Co. Leitrim | Davies, Oliver | Article in Journal | | 1946 |
| Old Kilcullen | Stokes, Margaret | Article in Journal | | 1899 |
| Old Leighlin after Laserian : division and reconciliation | Kenny, Colum | Article in Journal | | 1999 |
| Old St Malachy's | Paterson, T. G. F. | Article in Book | | 2013 |
| Old St Malachy's, 1752-1938 | Paterson, T. G. F.,Ó hÁdhmaill, Pádraig | Article in Book | | 2013 |
| Old St Mary's, 1784-1984 | Macaulay, AmbroseRogers, Patrick, | Monograph or Collective Volume | Howard Publications | 1984 |
| Old Testament borrowings in early Irish law | O'Neill, Pamela | Article in Journal | | 2013 |
| Old Testament borrowings in early Irish law | O'Neill, Pamela | Article in Journal | | 2013 |
| On a fertile rock : the Cistercian abbey of Corcomroe | MacMahon, Michael | Monograph or Collective Volume | Kincora Press | 2000 |
| On bells and bell-towers : origins and evolutions in Italy and Britain | Christie, Neil | Article in Journal | | 2004 |
| On bells and belltowers : origins and evolutions in Italy and Britain, AD 700-1200 | Christie, Neil | Monograph or Collective Volume | The Friends of All Saints' Church, Brixworth | 2004 |
| On Insular Bells and Tomb-shaped Shrines | Bourke, Cormac | Article in Book | Edinburgh University Press | 2025 |
| On some ancient remains at Kilmaclenine, with illustrations from the Pipa Colmani | Olden, Thomas | Article in Journal | | 1879 |
| On the Calendar of Oengus | | Article in Journal | | 1880 |
| On the formation of priests and the 1990 Synod of Bishops | O'Shea, Michael | Article in Journal | | 1990 |
| One hundred and fifty years, 1826-1976: sesquicentennial anniversary Portadown parish church (St. Mark's) | St. Mark's Church | Monograph or Collective Volume | Nelson & Knox (N.I.) (printer) | 1976 |
| One hundred years, 1871-1971 : centenary of St. Columba's parish church, Omagh | Taylor, Robert Kenneth | Monograph or Collective Volume | Graham & Sons [Printer] | 1971 |
| Opposition to pilgrimage in tenth-century Ireland | Boyle, Elizabeth | Article in Book | | 2015 |
| Orda judiciorum; sive, Methodus procedendi in negotiis et litibus in foro ecclesiastico civili Britannico et Hibernico. 2 vols. | OUGHTON Thomas | Monograph or Collective Volume | | 1728 |
| Ordeal by fire in medieval Ireland | Archan, Christophe | Article in Journal | | 2014 |
| Ordnance Survey memoir for the parish of Antrim : a description complied as part of the field survey for the first edition of the six inch Ordnance Survey maps / and edited and illustrated by James Boyle of the Ordnance Survey 1838; with an introduction to the Ordnance Survey parish memoirs 1830-40 by Brian Trainor | Boyle, James | Monograph or Collective Volume | Northern Ireland Public Record Office | 1969 |
| Ordnance Survey memoirs for the parishes of Desertmartin and Kilcronaghan 1836-1837 | Ballinascreen Historical Society | Monograph or Collective Volume | Ballinascreen Historical Society | 1981 |
| Origins of Saint Patrick's Cathedral, Skibbereen | O'Brien, GeraldO'Regan, Philip | Article in Journal | | 2018 |
| Origins of the diocese of Kilmore | Gwynn, Aubrey | Article in Journal | | 1961 |
| Our ancient ruined churches | Power, P. | Article in Journal | | 1951 |
| Our Christian heritage - some of the churches and ecclesiastical sites of diocese of Ferns | Cushen, Bernard | Article in Book | | 1999 |
| Our great inheritance : volume one - The Cathedral Church of Christ the Redeemer, Dromore | Doloughan, Andrew | Monograph or Collective Volume | Banbridge Chronicle Press [Printer] | 1995 |
| Our great inheritance : volume two - Dromore Cathedral Parish | Doloughan, Andrew | Monograph or Collective Volume | Banbridge Chronicle Press [Printer] | 1995 |
| Our Irish Romanesque architecture | Healy, J. | Article in Journal | | 1903 |
| Our Lady of Victories, Noeux-les-Mines | Downes, Seán | Article in Journal | | 2016 |
| Our Lady's Well | MacMahon, Bryan | Article in Book | | 2012 |
| Owning Church, 1798-1998 | O'Donnell, Michael | Monograph or Collective Volume | Michael O'Donnell | 1998 |
| Oylegate Glenbrien : a look back in time | Oylegate Glenbrien Journal Society | Monograph or Collective Volume | Oylegate Glenbrien Journal Society | 2008 |
| Pádraig Ó Mathúna: an enduring legacy | Charleton, Muireann | Article in Journal | | 2010 |
| Pagans and holy men : literary manifestations of twelfth-century reform | Ní Mhaonaigh, Máire | Article in Book | | 2006 |
| Papal Bullae found in Ireland | Ó Floinn, Raghnall | Article in Journal | | 2018 |
| Papal letters and Irish clergy : Clogher before the Reformation | Jefferies, Henry A. | Article in Book | | 2005 |
| Papal primacy then and now | O'Connell, Patrick | Article in Book | | 1970 |
| Parish bounds in the Kildare diocese | Gleeson, Dermot F. | Article in Journal | | 1949 |
| Parish Church on fire. From "The People" 13 February 1892 | | Article in Journal | | 2011 |
| Parish clergy since the 1700s | MacMahon, Bryan | Article in Book | | 2012 |
| Parish of Camus - Juxta - Bann : 1400 years of Christian witness | Gallagher, Adrian I. | Monograph or Collective Volume | A. & Co. | 2000 |
| Parish of Donaghcloney : 'something to celebrate', 1681-1981 | Cooper, S. J. W. | Monograph or Collective Volume | L. M. Press [Printer] | 1981 |
| Parish of Drumachose: a brief historical sketch : a guide to the church | Knowles, G W. A.Seymour, A. N. | Monograph or Collective Volume | Nicholson and Bass [Printer] | 1969 |
| Parish of Fivemiletown : a short history of St. John's with Kiltermon, 1870-1970 | Bloomfield, Emily | Monograph or Collective Volume | | 1970 |
| Parish of St. John the Evangelist, Orangefield : 21 years of church extension in Castlereagh | Crooks, S. B. | Monograph or Collective Volume | [Parish of Saint John the Evangelist, Orangefield] | 1958 |
| Parish of Tickmacrevan, County Antrim: an historical survey | Boyd, Hugh Alexander | Monograph or Collective Volume | C. J. Rountree | 1954 |
| Parish priests of Armagh since the Reformation | Ó Fiaich, Tomás | Article in Book | | 2013 |
| Parish priests of Armagh, 1752-1834 | Paterson, T. G. F. | Article in Book | | 2013 |
| Parish, pastoral care and 'tuath' in the diocese of Limerick, c. 1201 | MacCotter, Paul | Article in Journal | | 2013 |
| Parishes, pews and parsons : lay people and the Church of Ireland, 1647-1780 | Barnard, T. C. (Toby Christopher) | Article in Book | | 2002 |
| Parochial development in the deanery of Ardagh | Dove, Michael R. | Article in Journal | | 1990 |
| Parochial papers | Moore, Very Rev. Canon, P.P. Johnstown | Article in Journal | | 1879 |
| Partition, the Catholic church and the diocese of Clogher, c.1912-1928 | Phoenix, Eamon | Article in Book | | 2005 |
| Past lives : the memorials of Saint Patrick's Cathedral, Dublin | Fenton, Albert | Monograph or Collective Volume | St Patrick's Cathedral | 2012 |
| Pastoral care before the parish | | Monograph or Collective Volume | | 1992 |
| Patrician documents in medieval Germany | Ó Riain-Raedel, Dagmar | Article in Journal | | 1997 |
| Patrick and the Prosper connection | Keogh, Raymond M. | Article in Journal | | 2003 |
| Patrick Byrne and St. Paul's Arran Quay, Dublin | Grimes, Brendan | Article in Journal | | 2007 |
| Patrick Cardinal O'Donnell | Silke, John J. | Article in Journal | | 1988 |
| Patrick Dorrian, bishop of Down and Connor, 1865-1885 | Macaulay, Ambrose | Monograph or Collective Volume | Irish Academic Press | 1987 |
| Patrick Kelly bishop of Richmond | Keane, Frank | Article in Journal | | 2004 |
| Patrick MacMahon, bishop of Killaloe, 1829-1836 | Clancy, John | Article in Journal | | 1941 |
| Patrick Pollen : metaphysician in glass | Bowe, Nicola Gordon | Article in Journal | | 2011 |
| Patrick's reasons for leaving Britain | Flechner, Roy | Article in Book | | 2011 |
| Patronage and poverty in county Down : the case of Patrick Bronte | Adams, Amber M. | Article in Journal | | 1987 |
| Patrons and architects and the creation of Roman Catholic church architecture in nineteenth-century Dublin | Grimes, Brendan | Article in Journal | | 2015 |
| Patterns in stonework: the early church in Britain and Ireland. An introduction to ecclesiastical geology | Potter, John F. | Monograph or Collective Volume | Archaeopress | 2009 |
| Patterns of patronage : churches, round towers and the Dál Cais kings of Munster, c.950-1050 | Ó Carragáin, Tomás | Article in Book | | 2011 |
| Paul cardinal Cullen and the shaping of modern Irish nationalism | Bowen, Desmond | Monograph or Collective Volume | Gill & Macmillan | 1983 |
| Paul Cullen : the great ultramontane | Larkin, Emmet | Article in Book | | 2011 |
| Paul Cullen and his contemporaries, Vol. 4 : with their letters from 1820 - 1902 | Mac Suibhne, Peadar | Monograph or Collective Volume | Leinster Leader | 1974 |
| Paul Cullen and his contemporaries, with their letters from 1820-1902, Vol. 2 | Mac Suibhne, Peadar | Monograph or Collective Volume | Leinster Leader | 1963 |
| Paul Cullen and his contemporaries, with their letters from 1820-1902, Vol. 3 | Mac Suibhne, Peadar | Monograph or Collective Volume | Leinster Leader | 1965 |
| Paul Cullen and his contemporaries, with their letters from 1820-1902, Vol.1 | Mac Suibhne, Peadar | Monograph or Collective Volume | Leinster Leader | 1961 |
| Paul Cullen and the declaration of papal infallibility | Tanner, Norman | Article in Book | | 2011 |
| Paul Cullen and the Irish College, Paris | Chambers, Liam | Article in Book | | 2011 |
| Paul Cullen and the remaking of Catholicism in the Antipodes | Sweetman, Rory | Article in Book | | 2011 |
| Paul Cullen and the visual arts | Kane, Eileen | Article in Book | | 2011 |
| Paul Cullen in the Irish Conservative imagination | Shields, Andrew | Article in Book | | 2011 |
| Paul Cullen, J. J. McCarthy, and Holy Cross church, Clonliffe : the politics and iconography of architectural style | Montague, John | Article in Book | | 2011 |
| Paul Cullen: cardinal and politician | Senior, Hereward | Article in Book | | 1978 |
| Peculiar plaster: recent conservation of Irish eighteenth-century modelled plaster | Ireland, Richard | Article in Book | | 2012 |
| Penance and punishment in early medieval Ireland | Farrell, Elaine Pereira | Article in Journal | | 2021 |
| Penance, atonement and the Eucharistic community | Connolly, Hugh | Article in Book | | 2012 |
| Pentecostal origins : early Pentecostalism in Ireland in the context of the British Isles | Robinson, James | Monograph or Collective Volume | Paternoster | 2005 |
| People, priests and prelates : ecclesiastical democracy and the tensions of trusteeism | Carey, Patrick | Monograph or Collective Volume | # | 1987 |
| People, priests and prelates : ecclesiastical democracy and the tensions of trusteeism | Casey, Patrick | Monograph or Collective Volume | University of Notre Dame Press | 1987 |
| Perception and meaning : early Gothic architecture in the diocese of Cashel | Stalley, Roger | Article in Book | | 2011 |
| Peregrinatio : punishment and exile in the early Gaelic church | O'Neill, Pamela | Article in Journal | | 2010 |
| Peregrinatio: punishment and exile in the early Gaelic church | O'Neill, Pamela | Article in Journal | | 2012 |
| Perennial Problems of Scottish Catholics : Morale, Personnel and Money | Aspinwall, Bernard | Article in Book | | 2002 |
| Perpendiculer architecture? excavations at St Patrick's Church, Armoy, Co. Antrim | Hurl, Declan | Article in Journal | | 1998 |
| Peter Browne, devotional writer of the eighteenth century : bishop of Cork, 1710-1735 | Jackson, Robert Wyse | Monograph or Collective Volume | A.P.C.K. | 1963 |
| Peter McLaughlin Raphoe and Derry 1760-1840 | Donnelly, Philip | Article in Journal | | 2006 |
| Petition from parishioners of Blanchardstown to Archbishop Murray concerning clerical appointments, 1826 | Cronin, Elizabeth M. | Article in Journal | | 2002 |
| Petrie's 'magnum opus' | Murray, Peter | Article in Journal | | 2018 |
| Philip MacDevitt, bishop of Derry, 1766-97 | Donnelly, Philip | Article in Journal | | 2007 |
| Picking up the pieces | Dempsey, GaryNeligan, Thomas | Article in Journal | | 2020 |
| Picts and Britons in the early medieval Irish church : travels west over the storm-swelled sea | Plumb, Oisin | Monograph or Collective Volume | Brepols | 2020 |
| Pietro Tamburini's Jansenist legacy at the Irish College in Rome and his influence on the Irish Church | Korten, Christopher | Article in Journal | | 2017 |
| Piety and politics : funerary sculpture in Cashel, c. 1500-1640 | Moss, Rachel | Article in Book | | 2011 |
| Piety, patrons and prints: Franciscan altar plate, 1600-1650 | Krasnodebska-D'Aughton, Malgorzata | Article in Journal | | 2008 |
| Pii antistitis icon, or the Life of Francis Kirwan, bishop of Killala, 1669 | Lynch, John, d. in or after 1677 | Monograph or Collective Volume | The Stationery Office | 1951 |
| Plan and source analysis of Das Bibelwerk - Old Testament | McNamara, Martin | Article in Book | | 1987 |
| Plan of St Mary's Chapel | Matthews, Brendan | Article in Journal | | 2016 |
| Plenitude of power : the doctrines and exercises of authority in the middle ages : essays in memory of Robert Louis Benson | | Monograph or Collective Volume | Ashgate | 2006 |
| Poem in praise of John Cantwell, archbishop of Cashel, 1452-82 | | Article in Journal | | 1962 |
| Policy and patronage : the appointment of bishops 1660-61 | McGuire, James | Article in Book | | 1995 |
| Politics and administration, 1815-70 | Kinealy, Christine | Article in Book | | 2011 |
| Politics, interdenominational relations and education in the public ministry of Bishop James Doyle of Kildare and Leighlin, 1786-1834 | McGrath, Thomas | Monograph or Collective Volume | Four Courts | 1999 |
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| Pope Innocent III and Ireland : some unnoticed letters | Dunning, P. J. | Article in Journal | | 1945 |
| Post-medieval developments at Moyne friary, Co. Mayo: c.1540-c.1700 | McDermott, Yvonne | Article in Journal | | 2014 |
| Postscript by the Very Revd. Victor Griffin | Griffin, Victor | Article in Book | | 2009 |
| Power, politics and parish formation in the medieval cantred of Ardnurcher: 1172-1690 | Masterson, Rory | Article in Journal | | 2011 |
| Pre-Reformation archbishops of Cashel | Seymour, St. John D. | Monograph or Collective Volume | Church of Ireland Printing & Publishing Co. | 1910 |
| Pre-Romanesque churches in county Dublin and its hinterland | Walsh, Nessa | Article in Book | | 2008 |
| Pre-romanesque round towers: the development of masonry and its iconographic significance | Kerr, Sarah | Article in Journal | | 2011 |
| Pre-twelfth century Tuam | Claffey, John A. | Article in Book | | 2014 |
| Preached at Saint Patrick's : sermons from different ages | | Monograph or Collective Volume | Four Courts | 2004 |
| Preaching history, 1749: the Belfast sermons of Gilbert Kennedy and James Saurin | Gillespie, Raymond | Article in Book | NA | 2017 |
| Precious memories of the Old Kilmacud Church | Cahill, Matt | Article in Journal | | 2022 |
| Premonstratensian settlement in the Czech Lands and Ireland, 1142-1250 | Clyne, Miriam | Article in Journal | | 2018 |
| Presbyterian church records | Kinealy, Christine | Article in Book | | 1992 |
| Presbyterian history in Ireland : two seventeenth-century narratives | | Monograph or Collective Volume | Ulster Historical Foundation | 2016 |
| Presbyterians and the confessional state : the sacramental test as an issue in Irish politics, 1704–80 | Hayton, D. W. (David William) | Article in Journal | | 1997 |
| Preserving the past : history, manuscripts and belonging, c.1600-41 | Empey, Mark | Article in Book | Four Courts Press | 2025 |
| Preserving Zion : the anatomy of protestant nonconformist archives in Great Britain and Ireland | Field, Clive D. | Article in Journal | | 2008 |
| Priests and prelates of Armagh in the age of reformations, 1518-1558 | Jefferies, Henry A. | Monograph or Collective Volume | Four Courts | 1997 |
| Priests of Armagh, 1834-2013 | Ó Fiaich, Tomás | Article in Book | | 2013 |
| Priests' residences in later medieval Ireland | Bermingham, Helen | Article in Book | | 2006 |
| Primate Alexander | Neely, R. G. | Article in Book | | 1999 |
| Primate Alexander, archbishop of Armagh, a memoir | | Monograph or Collective Volume | [s.n.] | 1913 |
| Primate George Dowdall and the Marian restoration | Jefferies, Henry A. | Article in Journal | | 1998 |
| Primate Lombard and James I | Silke, John J. | Article in Journal | | 1955 |
| Primatus Dublinensis : the primacy of the see of Dublin, or a compendium of the arguments on which the see of Dublin relies, for the enjoyment and prosecution in its own right of the primacy of Ireland | Talbot, Peter | Monograph or Collective Volume | Church of Ireland Printing and Publishing Co. | 1947 |
| Prince Hohenlohe, Signor Pastorini and miraculous healing in early nineteenth-century Ireland | Geary, Laurence M. | Article in Book | | 1999 |
| Priory of Holmpatrick | Browne, Robert | Article in Journal | | 1998 |
| Prolegomena to a reappraisal of early Christianity in Man relative to the Irish Sea Province | Shaw, R. Cunliffe | Article in Journal | | 1967 |
| Prosopographica Glindelechensis : the monastic church of Glendalough and its community sixth to thirteenth centuries | Mac Shamhráin, Ailbhe | Article in Journal | | 1989 |
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| Protestant Dublin, 1660-1760 : architecture and iconography | Usher, Robin | Monograph or Collective Volume | Palgrave Macmillan | 2012 |
| Protestant philanthropy and social interaction in the 19th century | Donohoe, Patricia | Article in Book | | 2008 |
| Providence, revolution and the conditional defence of the union : Paul Cullen and the Fenians | Kelly, Matthew | Article in Book | | 2011 |
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| Psalm 21 and the beasts of the Ardagh Chalice | Clarke, Michael | Article in Book | | 2017 |
| Pseudo-Cyprian De Duodecim Abusivis Saeculi and the Bible | Breen, Aidan | Article in Book | | 1987 |
| Pseudo-Dionysius, Gilbert of Limerick and Innocent III : order, power and constitutional construction | Williamson, Shannon M. O. | Article in Book | | 2006 |
| Pugin and Maynooth College | Gallagher, Caroline | Article in Book | | 2012 |
| Pugin at Maynooth : the neo-Gothic contribution of A. W. N. Pugin to Maynooth College | | Monograph or Collective Volume | St Patrick's College, Maynooth|NUI Maynooth | 2012 |
| Quaker assets of the Carlow Meeting, Ireland: Part 1: Meeting Houses, meeting places and tenements located at Newgarden and in the town of Carlow|Part 2: Meeting places at Athy, Castledermot and Ballytore|Part 3: Burial grounds | Coutts, Peter | Article in Journal | | 2019 |
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| Raphoe Diocese: early Protestant places of worship in the 17th century | Roulston, William | Article in Journal | | 2019 |
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| Rathlin, island and parish, diocese of Connor | Law, H. I., Rev. | Monograph or Collective Volume | Mid-Ulster Printing Co. [Printer] | 1930 |
| Rathmines church and the '77' | Ó Maitiú, Séamas | Article in Journal | | 2017 |
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| Re-organisation of the dioceses of Kilfenora, Kilmacduagh, Galway and Killaloe, 1852-1883 | Murphy, Ignatius | Article in Journal | | 1984 |
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| Réamonn Ó Gallachair, bishop of Derry | Bonner, Brian | Article in Journal | | 1974 |
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| Reassessing the Church of Ireland's relationship with the Irish State in education : an archival approch | Roulston, Robbie | Article in Journal | | 2014 |
| Rebuilding the 'city of angels' : Muirchertach Ua Briain and Glendalough, c.1096-1111 | Ó Carragáin, Tomás | Article in Book | | 2010 |
| Recent geophysical investigations and LiDAR analysis at the Hill of Slane, Co. Meath | Barton, KevinBrady, ConorSeaver, Matthew | Article in Journal | | 2013 |
| Reclaiming an Irish 'Way of St James' | McLellan, Damien | Article in Journal | | 2016 |
| Reclaiming the forgotton church of St Thomas à Becket in Waterford City | McLellan, Damien
| Article in Journal | | 2016 |
| Recluses, relics and corpses : interpreting St Kevin's House | Ó Carragáin, Tomás | Article in Book | | 2011 |
| Reconstructing Irish Catholic origins after the Reformation | Ryan, Salvador | Article in Book | | 2012 |
| Reconstructing the territorial framework for ecclesiastical and secular power structures : a case study of the kingdom of Uí Fáeláin | MacCotter, Paul | Article in Book | | 2016 |
| Reconstructions of the Gothic past: the lost cathedral of Waterford | Stalley, Roger | Article in Journal | | 2013 |
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| Records of Convocation : index | | Monograph or Collective Volume | Boydell Press in association with the Church of England Record Society | 2006 |
| Records of Convocation : introduction | | Monograph or Collective Volume | Boydell Press in association with the Church of England Record Society | 2006 |
| Records of convocation. Ireland, 1101-1690 | | Monograph or Collective Volume | Boydell Press in association with the Church of England Record Society | 2006 |
| Records of the Church of Ireland | Refaussé, Raymond | Article in Book | | 1992 |
| Records of the general synod of Ulster, 1691-1820 | Anonymous | Monograph or Collective Volume | [s.n.] | 1890 |
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| Red, white and blue martyrdom | Stancliffe, Clare | Article in Book | | 1982 |
| References to church buildings in the Annals | Manning, Conleth | Article in Book | | 2000 |
| Reflections of a Newry-born priest who was secretary to three pontiffs | Magee, John | Article in Journal | | 1989 |
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| Reform and decay, 1500-1598 | Gillespie, Raymond | Article in Book | | 2009 |
| Reform, revolution, and reaction : Archbishop John Thomas Troy and the Catholic Church in Ireland, 1787-1817 | McNally, Vincent J. | Monograph or Collective Volume | University Press of America | 1995 |
| Reformation to Restoration | Gillespie, RaymondLennon, Colm, | Article in Book | | 2000 |
| Reformation to the Roseingraves, music 1550-1750 | Houston, Kerry | Article in Book | | 2009 |
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| Regional variation in Irish pre-Romanesque architecture | Ó Carragáin, Tomás | Article in Journal | | 2005 |
| Register of the Cathedral Church of St Columb, Derry, 1732-1775 | | Monograph or Collective Volume | Representative Church Body Library | 1999 |
| Register of the Cathedral Church of St. Columb, Derry, 1703-1732 | | Monograph or Collective Volume | Respresentative Church Body Library | 1997 |
| Register of the Cathedral of St FinBarre's, Cork, 1753-1804 | | Monograph or Collective Volume | Representative Church Body Library | 2008 |
| Register of the Cathedral of St. Patrick, Dublin, 1677-1869 | | Monograph or Collective Volume | Representative Church Body Library | 2007 |
| Register of the parish of Holy Trinity (Christ Church) Cork, 1643-1669 | | Monograph or Collective Volume | Representative Church Body Library | 1998 |
| Registers of a Midland parish, 1791-1810: Ballinahown, County Offaly and County Westmeath [with index] | | Article in Journal | | 2012 |
| Registrum Iohannis Mey : the register of John Mey, archbishop of Armagh, 1443-56 | | Monograph or Collective Volume | HMSO | 1972 |
| Registrum Octaviani : alias Liber Niger : the register of Octavian de Palatio, archbishop of Armagh, 1478-1513 | | Monograph or Collective Volume | Irish Manuscripts Commission | 1999 |
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| Relic of the Holy Cross and silver case in which it is placed; now deposited in the Ursuline Convent, Blackrock, Cork | Comerford, M., C.C. | Article in Journal | | 1879 |
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| Relics and the past : the material culture of Catholic martyrdom in Ireland | Tait, Clodagh | Article in Book | | 2009 |
| Relics, reliquaries and hagiography in south Ulster, 1450-1550 | Gillespie, Raymond | Article in Book | | 2006 |
| Religion and Greater Ireland : Christianity and Irish global networks, 1750-1950 | | Monograph or Collective Volume | McGill-Queen's University | 2015 |
| Religion and politics in urban Ireland, c.1500–c.1750 : essays in honour of Colm Lennon | | Monograph or Collective Volume | Four Courts | 2016 |
| Religion and rebellion : Historical Studies, XX : papers read before the 22nd Irish Conference of Historians, held at University College Dublin, 18-22 May 1995 | | Monograph or Collective Volume | University College Dublin Press | 1997 |
| Religion, culture and the bardic elite in early modern Ireland | Caball, Marc | Article in Book | | 2005 |
| Religion, culture and values : a cross-cultural analysis of motivational factors in Native Irish and American Irish Catholicism | Biever, Bruce Francis | Monograph or Collective Volume | Arno Press | 1976 |
| Religion, landscape and settlement: from Patrick to present | Whelan, Kevin | Monograph or Collective Volume | Four Courts Press|In association with the Group for the Study of Irish Historic Settlement | 2018 |
| Religions and the history of education : a historiography | Raftery, Deirdre | Article in Journal | | 2012 |
| Religious census of the parish of Monkstown county Dublin 1766 | Merrigan, Michael | Article in Journal | | 1992 |
| Religious change, 1550-1800 | O'Connor, Thomas | Article in Book | | 2006 |
| Religious controversy in comparative context : Ulster, the Netherlands and South Africa in the 1920s | Mathieson, Stuart ; Flipse, Abraham C. | Article in Journal | | 2020 |
| Religious issues in the early workhouse | Robins, J. A. | Article in Journal | | 1968 |
| Religious observation in everyday life | MacMahon, Bryan | Article in Book | | 2012 |
| Religious renewal and reform in the pastoral ministry of Bishop James Doyle of Kildare and Leighlin | McGrath, Thomas | Monograph or Collective Volume | Four Courts | 1998 |
| Religious renewal and reform in the pastoral ministry of James Doyle, O.S.A., bishop of Kildare and Leighlin, 1819-1834 | McGrath, Thomas G. | Thesis | | 1987 |
| Remains in Athy and neighbourhood | Carroll, J. | Article in Journal | | 1895 |
| Remains of a second pre-romanesque church at Inchcleraun on Lough Ree | Manning, Conleth | Article in Journal | | 2012 |
| Remains of St. Mary's abbey, Dublin : their explorations and researches A.D. 1886 | Various contributors | Monograph or Collective Volume | Forster | 1887 |
| Remarks on the liturgical fan, Flabellum or Rhipidion | Richardson, Hilary | Article in Book | | 1993 |
| Remarks on the walls and church of Athenry | McNeill, Charles | Article in Journal | | 1921 |
| Remembering All Hallows College | McCormack, Jim, CM | Monograph or Collective Volume | St Pauls Publishing | 2017 |
| Remembering the past ; a history of Killoughey church and cemetery | Condron, Breda | Monograph or Collective Volume | Author | 2019 |
| Renewal, Reformation, and ruins | Jefferies, Henry A | Article in Book | | 2012 |
| Renovation of St. Malachy's Church, Armagh, 2004-2005 | Murphy, Pádraig | Article in Book | | 2013 |
| Report of Bishop McDonagh, 1741 | McDonagh, Michael | Article in Journal | | 1965 |
| Report of Her Majesty's commissioners on the revenues and condition of the established church (Ireland) [Chairman : Earl of Meath], plus Appendix | Anonymous | Monograph or Collective Volume | | 1867-8 |
| Report of the rebuilding of the choir of Christ Church Cathedral, Dublin, and on the erection of a Synod Hall for the Church of Ireland | Street, George Edmund | Monograph or Collective Volume | Hodges, Figgis and Foster | 1871 |
| Report on progress of work, 'Irish Builder', 15 April 1872 | Irish Builder | Article in Book | | 2000 |
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| Reports of the Deputy Keeper of the Records for the years 1946-47, 1949 | Public Record Office of Northern Ireland | Monograph or Collective Volume | | 1949 |
| Restoration and consolidation : music 1865-1977 | Houston, Kerry | Article in Book | | 2009 |
| Restoration of Templemaley church windows | Kearns, Mary | Article in Journal | | 2019 |
| Retrenchment, renewal and disestablishment, 1840-77 | Crawford, John, 1953-2011 | Article in Book | | 2009 |
| Rev. Daniel Eneas Coyle, P.P. pastor and church builder | Coyle, Francis P. | Article in Journal | | 2012 |
| Rev. Devereux Spratt | Power, Ita | Article in Journal | | 1992 |
| Rev. Edward Geratty and the building and burning of Killeedy Church and Glebe House 1817-22 | Howard, Leonard | Article in Journal | | 2015 |
| Revd John Richardson (c. 1669-1747) : County Cavan rector and Irish-language enthusiast | Barnard, T.C. (Toby Christopher) | Article in Book | | 2014 |
| Review article : Córus Bésgnai : a window on the medieval Irish church | Murray, Kevin | Article in Journal | | 2020 |
| Review article: 'Revisionism' in Tudor reformation studies | Jefferies, Henry A. | Article in Journal | | 2013 |
| Revisiting reform : Armagh and Derry in the twelfth century | Ó Doibhlin, Ciarán | Article in Journal | | 2004 |
| Rewriting the werewolf and rehabilitating the Irish in the Topographia Hibernica of Gerald of Wales | Panxhi, Lindsey Zachary | Article in Journal | | 2015 |
| Richard Arthur, bishop of Limerick | Moloney, Michael | Article in Book | | 1951 |
| Richard FitzRalph : his life, times and thoughts | | Monograph or Collective Volume | Four Courts | 2013 |
| Richard fitzRalph, archbishop of Armagh, and the doctrine of dominion | Betts, R. R. | Article in Book | | 1949 |
| Richard Ledrede, bishop of Ossory - towards a new assessment | Brennan, James | Article in Journal | | 1998 |
| Richard of Dundalk | Dunne, Michael | Article in Book | | 2012 |
| Richard Rolt Brash: 'a practical antiquary and able architect' | Smith, Cathal Dowd | Article in Journal | | 2023 |
| Richard Whately : religious controversialist of the nineteenth century | McKerrow, R. E. (Ray E.) | Article in Journal | | 1979 |
| Richard Whately on the nature of human knowledge in relation to ideas of his contemporaries | McKerrow, R. E. (Ray E.) | Article in Journal | | 1981 |
| Riding against the clock : the visitations of Edward Tenison in Carmarthen and Ossory in the early eighteenth century | Guy, John R. | Article in Book | | 1999 |
| Ringing the changes. A short history of Wicklow Parish Church | O'Reilly, Stan J. | Article in Journal | | 2006 |
| Robert Peel and the Church of Ireland | Brynn, Edward | Article in Journal | | 1973 |
| Robert West, Christopher Myers and St James's Church, Whitehaven. | O'Dwyer, Frederick | Article in Journal | | 2009 |
| Roman Catholic church architecture in Great Britain and Ireland, 1829-1878 | O’Donnell, R. M. | Thesis | | |
| Romanesque architecture and sculpture at Ardmore | O'Keeffe, Tadhg | Article in Book | | 1992 |
| Romanesque as metaphor : architecture and reform in early twelfth-century Ireland | O'Keeffe, Tadhg | Article in Book | | 2000 |
| Romanesque Ireland : architecture and ideology in the twelfth century | O'Keeffe, Tadhg | Monograph or Collective Volume | Four Courts | 2003 |
| Romanesque voussoirs at St Finn Barre's Cathedral, Cork | Bradley, John, 1954-2014King, Heather | Article in Journal | | 1985 |
| Romanesque voussoirs at St. Fin Barre's Cathedral, Cork | Bradley, John, 1954-2014King, Heather | Article in Journal | | 1985 |
| Rome and Irish Catholicism in the Atlantic World, 1622–1908 | NA | Monograph or Collective Volume | Palgrave Macmillan | 2019 |
| Rome and the Isles : Ireland, England and the rhetoric of orthodoxy | Bracken, Damian | Article in Book | | 2009 |
| Room for expansion: the domestic ranges of Ross Errilly Franciscan Friary, co. Galway | McDermott, Yvonne | Article in Journal | | 2015 |
| Roots of Presbyterianism in Donegal, 1 : The Laggan and its Presbyterianism; 2 : In the days of the Laggan Presbytery. (The Laggan Presbytery books, 1, 2). 2 vols. | Lecky, A. G. | Monograph or Collective Volume | | 1905 |
| Rosclogher Castle: a Gaelic lordship centre on Lough Melvin, County Leitrim | McDermott, J.J.O'Conor, Kieran | Article in Journal | | 2015 |
| Roscommon : an independent dioceses and a separate kingdom | Anonymous | Article in Journal | | 1992 |
| Roscommon Presbyterian Church | Anonymous | Article in Journal | | 2000 |
| Ross Union of parishes | Peters, Christopher | Article in Journal | | 2000 |
| Rosserk Friary: a house of the Franciscan Third Order Regular | McDermott, Yvonne | Article in Journal | | 2011 |
| Rotulus pipae Clonensis | | Monograph or Collective Volume | | 1859 |
| Rotulus pipae Clonensis ex originali in registro ecclesiae cathedralis Clonensis asservato, nunc primum editus, cum prefatione et indicibus locupletissimis | Caulfield, Richard | Monograph or Collective Volume | George Nash | 1859 |
| Round towers of Ireland | Corlett, Christiaan | Monograph or Collective Volume | O'Brien Press | 2025 |
| Round towers of the Shannon | O'Regan, Carol | Thesis | | 1990 |
| Royal and saintly Cashel | Finn, Andrew | Monograph or Collective Volume | Catholic Truth Society of Ireland | 1929 |
| Royal inauguration assembley and the church in medieval Irealnd | FitzPatrick, Elizabeth | Article in Book | | 2003 |
| Running a stained glass studio in Youghal from 1894 to 1901: the early years of James Watson and company | Ryan, Vera | Article in Journal | | 2021 |
| Rural change in the Co. Armagh townland of Lissummon 1784 to the present day | Goss, Mary | Article in Journal | | 1987 |
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| Rush Library | McCullough, NiallRyan, Raymond | Monograph or Collective Volume | Associated Editions, distributed by Anne Street Press | 2010 |
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| S. Ciarán's church and his lands: a study of the history and development of Clonmacnois | Kehnel, Annette | Thesis | | 1995 |
| S. Columb's Cathedral Londonderry : historical guide, 1946 | King, R. G. S. | Monograph or Collective Volume | David Irvine (printer) | 1946 |
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| S. Stefano al Monte Celio, Donnchad mac Briain and papal legates in Ireland, 1064-1203 | Harrington, Jesse P. | Article in Journal | | 2024 |
| Sacred Cities? | Ryan, Michael | Article in Book | | 2007 |
| Sacred histories : a festschrift for Máire Herbert | | Monograph or Collective Volume | Four Courts | 2015 |
| Sacred places : the story of Christian architecture in Ireland | Hurley, RichardLarmour, PaulMoss, Rachel | Article in Book | | 2000 |
| Sacred space and "True religion" : the Irish Reformation and the Collegiate Church of St Nicholas, Galway | Ellis, Steven G., 1950- | Article in Journal | | 2018 |
| Sacred Spaces to Public Places | Curtis, Joe | Monograph or Collective Volume | First Return | 2021 |
| Saint Colman of Cloyne | Halliden, Patrick | Article in Book | | 1994 |
| Saint Erc's Hermitage | Knight, George | Article in Journal | | 2024 |
| Saint Flannán oratory at Killaloe : a Romanesque building of c.1100 and the patronage of King Muirchertach Ua Briain | Gem, Richard | Article in Book | | 2006 |
| Saint Joseph's Mullaghard, Tynan (1813-2018) : a millennium church history | Brady, Patrick J. | Monograph or Collective Volume | Middletown & Tynan Historical Society | 2018 |
| Saint Laurence O'Toole, archbishop of Dublin | Howlett, Liam | Article in Journal | | 1971 |
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| Saint Malachy, the Gill abbey of Cork, and the rule of Arrouaise | O'Sullivan, DenisWalsh, T. J. | Article in Journal | | 1949 |
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| Saint Nicholas' Church, Carrickfergus: Gleanings from its life-story of seven centuries. | Rutherford, J. C. | Monograph or Collective Volume | [St Nicholas' Church, Carrickfergus] | 1935 |
| Saint Peter's Church, Ennisnag, Co. Kilkenny | O'Reilly, Aideen | Article in Journal | | 2015 |
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| Saints and skinners: excavations along the northern precinct of the abbey of Saint Thomas the Martyr, Dublin | Duffy, Paul | Article in Book | | 2020 |
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| Saints’ dedications and the ecclesiastical landscape of Hiberno-Norse Dublin: Irish, Scandinavian and others | Bhreathnach, Edel | Article in Book | | 2020 |
| Sancti Columbani opera | | Monograph or Collective Volume | Institute for Advanced Studies | 1957 |
| Sandhills, silver and shrines : fine metalwork of the medieval period in Donegal | Ó Floinn, Raghnall | Article in Book | | 1995 |
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| Scattery : an unknown part of the diocese of Limerick | Newman, Jeremiah | Article in Journal | | 1992 |
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| Scotland and Ulster : a Presbyterian perspective, 1603-1700 | Gillespie, Raymond | Article in Book | | 2009 |
| Scots and Irish clergy ministering to immigrants, 1830-1878 | Aspinwall, Bernard | Article in Journal | | 1996 |
| Scots Catholics in Ulster, 1603-41 | Mac Cuarta, Brian | Article in Book | | 2016 |
| Scots settlement and Presbyterianism in Sligo, 1600-2010 | Johnston, Jack | Article in Book | | 2024 |
| Scottish abbeys : An Introduction to the mediaeval abbeys and priories of Scotland | Cruden, Stewart | Monograph or Collective Volume | | 1960 |
| Scottish Protestant clergy and the origins of dissent in Ireland | Ford, Alan | Article in Book | | 2016 |
| Scríbhinní i gCartlainn an Vatican : tuarascbháil | Mac Fhinn, Pádraig Eric, 1895-1987 | Article in Journal | | 1946 |
| Scripture politics : selections from the writings of William Steel Dickson : the most influential United Irishman of the north | Clifford, BrendanDickson, William Steel | Monograph or Collective Volume | Athol | 1991 |
| Seals of Kildare bishops and dignitaries | Armstrong, E. C. R. | Article in Journal | | 1914 |
| Séamus Mhac Cúarta do chum an duan so don Easbog Ó Siadha[i] l | | Article in Journal | | 1939 |
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| Seanmóireacht in Éirinn ó 1000 go 1200 | Mac Donncha, Frederic | Article in Book | | 1982 |
| Second congregation Belfast, 1708-2008 | Courtney, Roger | Monograph or Collective Volume | All-Souls Non-subscribing Presbyterian Congregation | 2008 |
| Secret churches | Surman, Richard | Monograph or Collective Volume | Collins | 2008 |
| Select bibliography relating to Armagh diocesan history | Anonymous | Article in Journal | | 1989 |
| Select bibliography relating to Armagh diocesan history | Anonymous | Article in Journal | | 1989 |
| Select bibliography relating to Armagh diocesan history | Canning, Joseph | Article in Journal | | 1988 |
| Select document : a settlement between the canons of St Thomas’s Abbey, Dublin, and Walter de Lacy concerning the church of Ardmulchan granted to the canons by Theobald Walter | Flanagan, Marie Therese | Article in Journal | | 2020 |
| Select document: W. E. Gladstone, 'Parliamentary Doings with the Irish Church' | Gladstone, William Ewart, 1809-1898 | Article in Journal | | 2018 |
| Select documents. Edward I's government and the Irish church : a neglected document from the Waterford-Lismore controversy | | Article in Journal | | 2001 |
| Seoda arna gcaobhnú i Mainistir Chnoic MhellerÍ | Ó Maidín, Uinseann | Article in Journal | | 2018 |
| Serfs and Citizens: the church tenants of medieval Armagh | Simms, Katharine | Article in Journal | | 2021 |
| Servants of Christ : a short history of the bishops of Derry since the reformation, 1605-1995 | Orr, J. C. D. | Monograph or Collective Volume | A.P.C.K. | 1997 |
| Set on a hill : the story of Knockbreda Parish Church | Wood, R. Ernest | Monograph or Collective Volume | Universities Press [Printer] | 1987 |
| Settlement on Mellifont Abbey’s monastic estate in counties Meath and Louth (1540–1) | Stout, Geraldine | Article in Book | Four Courts Press | 2018 |
| Settlement, society and landscape in Brugh na Bóinne since the mid-sixteenth century | Jenkins, William | Article in Book | | 2008 |
| Seventeenth-century Ireland : making Ireland modern | Gillespie, Raymond | Monograph or Collective Volume | Gill & Macmillan | 2006 |
| Shades of Shandon | Salter, George Alfred | Monograph or Collective Volume | [St Ann, Shandon?] | 1979 |
| Shandon | Rynne, Colin | Article in Book | | 2005 |
| Short history of the parish of Billy | Johns, Adam A., Rev. | Monograph or Collective Volume | Impact Printing [Printer] | 1982 |
| Short history of the parish of Derrykeighan, from the dedication of the church of St Colman, 9th September 1831 to July 1981 | Johns, Adam A., Rev. | Monograph or Collective Volume | Bushfoot Press [Printer] | 1981 |
| Short history of the ruins of St Mary's church, Colla Road, Schull | Mackey, Mary | Article in Journal | | 2000 |
| Sidelights on the bishops of Raphoe from the register of Pope Innocent III | Dunning, P. J. | Article in Book | | 1959 |
| Sidelights on the Kildare ascendancy : a survey of Geraldine involvement in the Church, c.1470-c.1520 | Lyons, Mary Ann | Article in Journal | | 1994 |
| Sir John Davies, the ancient constitution and civil law | Pawlisch, H. S. | Article in Journal | | 1980 |
| Sir Thomas Farrell, Stillorgan sculptor | MacMahon, Bryan, 1949- | Article in Journal | | 2013 |
| Six Board of First Fruits churches in southwest Cork | O'Mahony, Bernard | Article in Journal | | 2010 |
| Sixmilecross Parish : a brief historical account: thanksgiving for the Sesquicentenary, 1836-1986 | Murphy, Thomas | Monograph or Collective Volume | [Sixmilecross Parish] | 1986 |
| Sixty years of church life in St. Nicholas' Parish, Belfast : a souvenir of the opening of the parish hall, 31st January, 1959 | Mercer, John, Rev. | Monograph or Collective Volume | M & W. Publications. | 1959 |
| Skellig Michael, Co. Kerry : the monastery and South Peak. Archaeological stratigraphic report: excavations 1986-2010 | | Monograph or Collective Volume | Government of Ireland | 2011 |
| Sliabh Larga and Cuaille Ciannachta in the synod of Rath Breasail | Ó Maolagáin, Pádraig | Article in Journal | | 1947 |
| Sliocht Lachlain Maguire (1300-1600). Ecclesiastics of the Erne | Schlegel, Donald M.
| Article in Journal | | 2013 |
| Sneem : the knot in the ring | Stoakley, T. E. | Monograph or Collective Volume | Sneem Tourism Association | 1986 |
| Soar like an eagle : the life and times of Charles Guilfoyle Doran | McSweeney, Anne | Monograph or Collective Volume | [The author] | 2018 |
| Social structures of the Irish church : a new source in papal penitentiary dispensations for illegitimacy | Haren, Michael J. | Article in Book | | 1994 |
| Society and economy, 1815-70 | Connolly, Seán J. | Article in Book | | 2011 |
| Society outing to Roscrea and Leap Castle | Feerick, Aidan | Article in Journal | | 2024 |
| Some account of the parish of Graig-na-managh | Comerford, M., P.P. | Article in Journal | | 1883 |
| Some aspects of the life of Doctor John Thomas Troy, O. P., 1739-1823 | Peel, H. E. | Article in Journal | | 1957 |
| Some aspects of the relationship between secular and ecclesiastical learning in Ireland and England in the early post-conversion period | Moisl, Hermann | Thesis | | |
| Some British aspects of the earliest Irish Christianity | Dumville, David N. | Article in Book | | 1984 |
| Some Church of Ireland churches in the diocese of Raphoe | Crooks, David | Article in Journal | | 2004 |
| Some church silver of Limerick city | Jackson, Robert Wyse. | Article in Journal | | 1949 |
| Some civil and ecclesiastical territorial divisions and their geographical significance | Nolan, William | Article in Book | | 1986 |
| Some comparative aspects of Irish law | Donaldson, A. G. | Monograph or Collective Volume | Duke University Press | 1957 |
| Some country churches by Joseph Welland | Rowan, Alistair | Article in Book | | 2003 |
| Some County Sligo Rood Lofts and their wider Irish contexts | Higgins, Jim | Article in Journal | | 2020 |
| Some Donegal Franciscan chalices | MacGrath, Kevin | Article in Book | | 1952 |
| Some early 19th-century cross carvings in Galway city | O'Dowd, Peadar | Article in Journal | | 2014 |
| Some early Coleraine [and district] marriage 'strays', 1655-1771 | Forrest, Robert | Article in Journal | | 2009 |
| Some early masonry churches and the round tower at Clonmacnoise | Manning, Conleth | Article in Book | | 2003 |
| Some Franciscan altar plates from Drogheda | Fennessy, Ignatius | Article in Journal | | 2012 |
| Some historical memoranda respecting the territory of Kilwarlin and a few of the places neighbouring as well as included. | Hume, Abraham | Monograph or Collective Volume | Privately printed. T. Brakell [Printer] | 1866 |
| Some interesting chalices | Scantlebury, C. | Article in Journal | | 1946 |
| Some Irish altar plate | Buckley, J. J. (John Joseph) | Article in Journal | | 1942 |
| Some Irish ecclesiastical titles in the tenth and eleventh centuries | Gwynn, Aubrey | Article in Journal | | 1942 |
| Some lesser known ecclesiastical sites in Fore, Co. Westmeath | Masterson, Rory | Article in Journal | | 1998 |
| Some Limerick ecclesiastical antiquities | Hunt, John | Article in Book | | 1951 |
| Some MacMahon wills from Clogher diocese | Ó Mórdha, P. | Article in Journal | | 1991 |
| Some metropolitan visitations of Meath in the fifteenth century | Lynch, Anthony | Article in Journal | | 1982 |
| Some minor Irish cathedrals | Clapham, Alfred William, Sir, 1883-1950 | Article in Book | | 1939 |
| Some minor Irish cathedrals | Clapham, Alfred William, Sir, 1883-1950 | Article in Book | | 1952 |
| Some new perspectives on Sligo Dominican priory | O'Conor, Kieran Denis | Article in Book | | 2024 |
| Some northern churchmen and some notes on the Church in Belfast | MacNeice, John Frederick | Monograph or Collective Volume | Church of Ireland Printing & Publishing Co. Ltd | 1934 |
| Some notes concerning the terrier or ledger book of Down and Connor which relate to the northern and eastern parts of Connor diocese | | Article in Journal | | 1990 |
| Some notes on Killala Diocese | Neary, J. | Article in Journal | | 1913 |
| Some notes on Kilmactalway Co. Dublin | McCabe, Brian | Article in Journal | | 2022 |
| Some notes on the abbey and cross of Moone and other places in the valley of Griese | Carroll, F. M. | Article in Journal | | 1895 |
| Some notes on the cathedral of St. Brigid of Kildare | Craig, H. N. | Monograph or Collective Volume | George F. Healy | 1931 |
| Some notes on the cathedral of St. Brigid of Kildare | Craig, H. N. | Monograph or Collective Volume | Leinster Leader (printer) | 1946 |
| Some notes on the history of Kilbride church and graveyard Co. Dublin | McCabe, Brian | Article in Journal | | 2020 |
| Some notes on the history of Kilmahuddrick | McCabe, Brian | Article in Journal | | 2023 |
| Some notices of the castle and of the ecclesiastical buildings at Trim. | Butler, Richard, 1794-1862 | Monograph or Collective Volume | | 1861 |
| Some notices of the castle and of the ecclesiastical buildings of Trim | Butler, Richard, 1794-1862 | Monograph or Collective Volume | Meath Archaeological and Historical Society | 1978 |
| Some old illustrations of St Doulagh's Church, Balgriffin, Co. Dublin | Harbison, Peter | Article in Book | | 2009 |
| Some papers of Henry Hughes, O.F.M., vicar apostolic of Gibraltar, 1839-56 | Ó Huallacháin, Maelísa | Article in Journal | | 1998 |
| Some parish priests of the diocese of Killaloe and some puzzles of local history | Anonymous | Article in Journal | | 1939 |
| Some priors of Fore, Co. Westmeath | Seymour, St. John D. | Article in Journal | | 1934 |
| Some problems concerning the organization of the Church in early medieval Ireland | Sharpe, Richard | Article in Journal | | 1984 |
| Some recent contributions to Cork diocesan history | Collins, John T. | Article in Journal | | 1951 |
| Some records of a Cistercian abbey : Holm Cultram, Cumberland | | Monograph or Collective Volume | | 1899 |
| Some remarks on Cummian's Paschal Letter and the Commenta on Mark ascribed to Cummian | Walsh, Maura | Article in Book | | 1987 |
| Some repercussions of the Act of Union on the Church of Ireland, 1801-20 | Brynn, Edward | Article in Journal | | 1971 |
| Some seventh-century Hiberno-Latin texts and their relationships | Breen, Aidan | Article in Journal | | 1984 |
| Some Ulster ecclesiastical bells | Morris, Henry | Article in Journal | | 1931 |
| Some Watson windows (1894-1931) in North Cork Churches | Ryan, Vera | Article in Journal | | 2018 |
| Something fishy about the church at Killadreenan. ...archaeological evidence for British influence on Irish church architecture in the eleventh century | Corlett, Christiaan | Article in Journal | | 2015 |
| Source material for a parish history in the dioceses of Connor and the united diocese of Down and Dromore | Cox, Robert | Article in Journal | | 1977 |
| Sources for British and Irish history in the Instrumenta Miscellanea of the Vatican Archives | Burns, C. S. (Charles S.) | Article in Journal | | 1971 |
| Sources for early modern Irish history 1534-1641 | Edwards, R. W. D. (Robert Walter Dudley)O'Dowd, Mary | Monograph or Collective Volume | Cambridge University Press | 1985 |
| Sources for researching the Protestant working class in the archives of the Church of Ireland | Maguire, Martin | Article in Journal | | 2014 |
| Sources of law of the Church of Ireland : identification, investigation and reform | Colton, W. Paul | Thesis | | |
| Souterrain at Muirhevnamore, Marshes Upper, Dundalk | Campbell, Kieran | Article in Journal | | 2002 |
| South Belfast | Templeton, George E.Weatherall, Norman | Monograph or Collective Volume | Nonsuch | 2007 |
| South Belfast : history and guide | Templeton, George E.Weatherall, Norman | Monograph or Collective Volume | Nonsuch | 2008 |
| South Tipperary, 1570-1841 : religion, land and rivalry | Butler, David J., 1976- | Monograph or Collective Volume | Four Courts | 2006 |
| Space organization in early Irish monasteries : the platea | Picard, Jean-Michel | Article in Book | | 2011 |
| Spiritual renewal and changing landscapes : the mendicant orders in Ireland, thirteenth– sixteenth centuries | Lafaye, Anne-Julie | Article in Book | Four Courts Press | 2018 |
| St Ailbe's heritage : a guide to the history, genealogy and towns of the Archdiocese of Cashel and Emly | Tipperary Heritage Unit | Monograph or Collective Volume | Tipperary Heritage Unit | 1999 |
| St Albert, patron of Cashel : a study in the history of diocesan episcopacy in Ireland | Hennig, John | Article in Journal | | 1945 |
| St Andrew's church | Goslin, Bernadette | Article in Journal | | 1990 |
| St Andrew's Lucan : history, architecture and artworks | Twomey, Valerie | Article in Book | | 2008 |
| St Audeon's Roman Catholic Church, High Street, Dublin | Semple, Una | Article in Journal | | 2005 |
| St Audoen's Church, Cornmarket, Dublin : archaeology and architecture | | Monograph or Collective Volume | Stationery Office | 2006 |
| St Bartholomew’s. A history of the Dublin parish with an account of the church building and the art it contains | Milne, Kenneth
Rowan, Alastair | Monograph or Collective Volume | Hinds | 2019 |
| St Bernard, his views on architecture and the Irish dimension | Stalley, Roger | Article in Journal | | 1993 |
| St Brendan's cathedral, Loughrea, 1897-1947 | MacGreevy, Thomas | Article in Journal | | 1947 |
| St Brendan's cathedral, Loughrea, Co. Galway | Egan, Patrick J. | Monograph or Collective Volume | Eason | 1986 |
| St Brendan's Church of Ireland, Tarbert, 1814-2014 : 200 years of change | Tarbert Historical and Heritage Society | Monograph or Collective Volume | Tarbert Historical and Heritage Society | 2014 |
| St Brigid and the cathedral church of Kildare | Cowell, George Young | Article in Journal | | 1899 |
| St Brigid's cathedral in the age of reform, 1500-1700 | Gillespie, Raymond | Article in Journal | | 2001 |
| St Brigid's Cathedral, Kildare : a history | | Monograph or Collective Volume | Kildare Archaeological Society | 2001 |
| St Canice's cathedral, Kilkenny | Leask, H. G. (Harold G.) | Article in Journal | | 1949 |
| St Cartha's : Sacred sites in the Parish of Kilcar, Co. Donegal | Campbell, Catherine | Monograph or Collective Volume | Catherine Campbell | 2001 |
| St Colman's Church, Shrule | McDermott, Yvonne | Article in Journal | | 2011 |
| St Coman's Church, Kinvara | Carey, Anne | Article in Journal | | 2008 |
| St David's Church, Castleinch: an ivy-clad ruin | Hyland, Richard | Article in Journal | | 2015 |
| St David's church, Naas : a new dimension | Ó Ríordáin, Breandán | Article in Journal | | 1987 |
| St Dympna's Church, Carlow. A student project | Conroy. Thomas | Article in Journal | | 2009 |
| St Eunan's Cathedral, Letterkenny | Ó Baoighill, Pádraig, Rev. | Article in Book | | 2013 |
| St Fachtna of Ross and his church | Bangerter, Doreen | Article in Journal | | 2009 |
| St Fin Barre's Cathedral | Holland, Michael | Article in Book | | 2005 |
| St Flannan's cathedral Killaloe : a short history | Owen, Edwin | Monograph or Collective Volume | Ballinakella | 1992 |
| St James' Durrus : a parish history | | Monograph or Collective Volume | Forum Publications | 1992 |
| St James's parish, Kilbeggan. The old graveyard, relic cemetry | Flynn, Kitty | Monograph or Collective Volume | [The author] | 2018 |
| St John and St Anne stained glass window. Cathedral of the Annunciation and St Nathy, Ballaghaderreen | Boyce, Angela | Article in Journal | | 2019 |
| St John the Evangelist Church, Moyraverty | McCorry, F.X. (Francis Xavier) | Article in Journal | | 2008 |
| St John's - an area of international historical significance. Extracts from articles in "Roscommon Herald" | | Article in Journal | | 2000 |
| St John's Cathedral, Limerick | Devane, A. D. | Article in Book | | 1951 |
| St John's Cathedral, Sligo | Doyle, Bernie | Article in Journal | | 2018 |
| St John's Church, Coolclogh, Co. Cork | O'Reilly, Barry | Article in Journal | | 2011 |
| St John's Church, Cork. Centenary souvenir, 1840-1940. | | Monograph or Collective Volume | [St John's Church] | 1940 |
| St John's Church, Fivemiletown, 1736-1986 | Johnston, Jack | Monograph or Collective Volume | [St John's Church] | 1986 |
| St John's Church, John Street, Kilkenny | Murphy, Damian | Article in Journal | | 2022 |
| St Joseph's R.C. Church, Glasthule. 150 years old | O'Donnell, Mona | Article in Journal | | 2019 |
| St Kevin's Church, Camden Row | Ó Maitiú, Séamas | Article in Journal | | 2010 |
| St Kevin’s – An ancient Dublin Parish | Kenny, Adrian | Monograph or Collective Volume | | 2018 |
| St Laserian's Cathedral, Old Leighlin. "A flame of gold over noble Ireland" | Wynne, Gordon, Dean | Article in Journal | | 2006 |
| St Martin's church Templemartin : a short history, 1797-1997 | Fenning, John E. | Monograph or Collective Volume | [The author] | 1997 |
| St Mary's abbey and the church at Skryne | Hickey, Elizabeth | Article in Journal | | 1952 |
| St Mary's abbey, Devenish | Mullarkey, T. | Article in Journal | | 1961 |
| St Mary's Abbey, Dublin, and its medieval farm suppliers | Stout, Geraldine | Article in Book | | 2015 |
| St Mary's Cathedral | Ryan, Cyril | Article in Journal | | 2015 |
| St Mary's Cathedral, Kilkenny : notes on the foundation, construction, furnishings | Phelan, Margaret M. | Monograph or Collective Volume | The author | 1972 |
| St Mary's cathedral, Limerick : its development and growth | Hewson, R. F. | Article in Journal | | 1944 |
| St Mary's Church of Ireland church Castletownroche | Annesley, Patrick G | Article in Journal | | 1994 |
| St Mary's Church of Ireland, Julianstown, Co. Meath | Rutherford, Janet E. | Article in Book | | 2012 |
| St Mary's Church, Ballymascanlan | Bellew, Séamus | Article in Journal | | 2017 |
| St Mary's Church, Bennekerry, Carlow. Solemnly dedicated Sunday 9 November 1862 | Browne, John | Article in Journal | | 2019 |
| St Mary's Church, Buttevant, Co. Cork 1828-1886 : notes on its building history | O'Brien, James | Article in Book | | 2013 |
| St Mary's Hall and Alms Houses, Kilkenny in the 1950s and 1960s. Interview with Eileen Bibby | Bibby, Eileen | Article in Journal | | 2013 |
| St mary's parish, Howth, 1816-2016 | Henly, DaphneO'Laoire, Carolyn | Monograph or Collective Volume | Select Vestry of St Mary's, Howth | 2016 |
| St Mary's Sandyford: a local hidden treasure | Dixon, Michael | Article in Journal | | 2011 |
| St Maur's Chapel, Rush | McCann Moore, Margaret | Monograph or Collective Volume | Beta Printing Services | no date given |
| St Mel's cathedral, Longford, 1840. visitor's guide | Clarkson, Sr. AngelaDuffy, Francis, bishopHughes, KittyMcGuinness, SiveMurray, Tom, Rev.O'Reilly, Colm, bishopSalmon, GerryWhite, Alex | Monograph or Collective Volume | [St Mel's Cathedral] | 2016 |
| St Mel's crozier | Daly, Cathal B. | Article in Journal | | 1974 |
| St Michael's Church, Dun Laoghaire | Scudds, Anna | Article in Journal | | 2004 |
| St Michan's church and parish : our church. A labour of love through the centuries | Pender, Paddy | Monograph or Collective Volume | | 2011 |
| St Moling, contemplative Christianity and the medieval landscape of south Carlow : biblical style in the poem Gáir na Gairbhe | de Paor, Máire B. | Article in Book | | 2008 |
| St Nicholas' parish church, Lisburn Road, Belfast : 75th anniversary | | Monograph or Collective Volume | [St Nicholas' Parish Church] | [1976] |
| St Nicholas's parish church, Galway : structural and architectural evidence for the high medieval period | McKeon, Jim | Article in Journal | | 2009 |
| St Patrick and the Defensio | Ó Raifeartaigh, T. | Article in Journal | | 1983 |
| St Patrick at his "first synod" | Dumville, David N. | Article in Book | | 1993 |
| St Patrick's bell shrine: form and layout of the plates | Stevick, Robert D. | Article in Journal | | 2008 |
| St Patrick's cathedral (C. of I.) | O'Neill, MichaelStalley, Roger | Article in Book | | 2005 |
| St Patrick's Cathedral, Armagh | McCourt, Eileen | Monograph or Collective Volume | Teachers' Centre | 1981 |
| St Patrick's Cathedral, Dublin : A History | | Monograph or Collective Volume | Four Courts Press | 2009 |
| St Patrick's Cathedral, Dublin : the recent discovery of the thirteenth-century south nave wall | Simpson, Linzi | Article in Book | | 2015 |
| St Patrick's cathedral, Dublin and its prebendal churches : gothic architectural relationships | O'Neill, Michael | Article in Book | | 2004 |
| St Patrick's Church extension | Hasson, Seamus | Article in Journal | | 1999 |
| St Patrick's church, Donaghmore, Co. Tyrone : a history | Bogue, Patricia | Monograph or Collective Volume | Blackstaff Press | 2018 |
| St Patrick's Church, Knockcroghery | Coyne, Ferdy | Article in Journal | | 2000 |
| St Patrick's Church, Newport, Co. Mayo | Newport Foroige Club | Monograph or Collective Volume | Newport Foroige Club | 1986 |
| St Patrick's Collegiate Chapel, Maynooth, Co. Kildare | McGuane, Eilíse | Article in Journal | | 2011 |
| St Patrick, Skerries and the earliest evidence for local church organization in Ireland | Swift, Catherine | Article in Book | | 2004 |
| St Senán : early monastic Enniscorthy | Breen, Aidan | Article in Book | | 2010 |
| St Sepulchre’s palace: new perspectives from recent excavations | Hayden, Alan R. | Article in Book | NA | 2020 |
| St Teresa's Church, Clarendon Street, Dublin | Monaghan, Phelim | Monograph or Collective Volume | Carmelite Publications | 1992 |
| St Vincent's Church and the Vincentians in Cork | O'Callaghan, Antóin | Article in Journal | | 2025 |
| St. Andrew's Church, Westland Row, Dublin : an enduring presence : an overview of the history of St. Andrew's Church from its origins to the present | Watson, Elizabeth | Monograph or Collective Volume | St. Andrew's Church | 2007 |
| St. Andrew's, Inishargy, Balligan | Beckett, J. C. (James Camlin),Dunleath, LordJackson, C. T., | Monograph or Collective Volume | | 1967 |
| St. Anna's Church, MIllstreet : a history | Tangney, Denis | Monograph or Collective Volume | MIllstreet Museum Society | 1995 |
| St. Brendan's Cathedral, Clonfert, County Galway : conservation plan | Nolan, Dermot,Ruane, Pat | Monograph or Collective Volume | The Heritage Council | 2004 |
| St. Brendan's Sydenham in the twentieth century: a historical narrative | Johnston, Sam | Monograph or Collective Volume | | 2001 |
| St. Brigid's 300 year milestone | Kuss, Victor | Article in Journal | | 2014 |
| St. Caimin’s, Inis Cealtra. Reconstruction of the doorway | De Paor, LiamGlenn, Deirdre | Article in Journal | | 1995 |
| St. Canice's Cathedral in an age of change 1500-1560 | Gillespie, Raymond | Article in Book | | 2000 |
| St. Colman's Parish Church, Ardboe: a short sketch 1830-1930 | Baxter, John | Monograph or Collective Volume | [St. Colman's Parish, Ardboe] | 1989 |
| St. Columba's Church, Parish of Whiterock [Diocese of Connor] | Cunningham, R. S. | Monograph or Collective Volume | Castle [Printers] | 1978 |
| St. David's Church, Naas | De Burgh, Archdeacon | Article in Journal | | 1895 |
| St. Doulagh's church | Harbison, Peter | Article in Journal | | 1982 |
| St. Enoch's congregation, 1872-1972 : an account of Presbyterianism in Belfast | Barkley, John M. | Monograph or Collective Volume | St Enoch's Church | 1972 |
| St. Ernan's : a short history | Seaver, George | Monograph or Collective Volume | St. Ernan's Management Committee | 1964 |
| St. Fachtna's cathedral, Ross : a history | Peters, Christopher | Monograph or Collective Volume | Select Vestry, Ross union of parishes | 1999 |
| St. Feichin's, Ballisodare, Co. Sligo : discoveries and rediscoveries | Timoney, Mary B. | Article in Book | | 2002 |
| St. Fethlimidh's Cathedral, Kilmore: a short history | Combe, John Charles | Monograph or Collective Volume | [Kilmore diocese]|Printed by L.M. Press, Lurgan, Co. Armagh | 1993 |
| St. Fillan's crozier - its cult and its reliquaries, AD 1000-2000 | Glenn, Virginia | Article in Book | | 2009 |
| St. Fin Barre's cathedral | | Monograph or Collective Volume | Eason & Son | 1984 |
| St. Fin Barre's cathedral : historical and descriptive | Robinson, Andrew C. | Monograph or Collective Volume | Guy and Co. | 1897 |
| St. Finbarr's, Carrickmacross : a short history | Sutcliffe, John | Monograph or Collective Volume | | 1990? |
| St. Finnian's, Cregagh : the story of the first fifty years 1932-1982 | Hammond, David | Monograph or Collective Volume | [David Hammond] | 1982 |
| St. Flannan's Cathedral, Killaloe | Bourke, F. R. | Article in Journal | | 1980 |
| St. George’s Church, Grange Sylvae, Goresbridge, Co. Kilkenny | Whitford-McDonald, Emily | Article in Book | | 2013 |
| St. James Graveyard | MacMahon, Bryan,Moriarty, James | Article in Book | | 2012 |
| St. John's / Waterford | Daly, Paul | Article in Journal | | 2008 |
| St. John's Church Kilnamanagh, and a short paper on the Oxford Movement. Church of Ireland. Diocese of Ferns | Hall, William John | Monograph or Collective Volume | E. J. Rickard (Printer) | 1956 |
| St. John's Church, Islandmagee 1595-1986 : a short history | Waring, Joseph | Monograph or Collective Volume | [St John's Church, Islandmagee] | 1986 |
| St. John's Church, Kilteevogue, 1879-1979 | Carson, G. J. A. | Monograph or Collective Volume | [St. John's Church, Kilteevogue] | 1979 |
| St. John's Church, Mounttown | McGovern, Brendan | Article in Journal | | 2010 |
| St. John's Church, Newcastle : a brief history, 1832-1982 | Jackson, J. G. | Monograph or Collective Volume | [St John's Church] | 1982 |
| St. John's friary, Athy | Hannon, T. J. | Article in Journal | | 1895 |
| St. Jude's Parish Church, Ballynafeigh: a record of the first hundred years 1873-1973 | McCarter, Norman | Monograph or Collective Volume | [St Jude's parish] | 1973 |
| St. Mark's Dundela, Diocese of Down : its annals and archives | | Monograph or Collective Volume | S.P.C.K. | 1932 |
| St. Mark's Killylea 1832-1982 : a short history of Killylea Parish, its church and people | Henderson, Isobel | Monograph or Collective Volume | C. R. Print | 1982 |
| St. Mary's Abbey, Ballyhaunis | O'Connor, John | Monograph or Collective Volume | Augustinian Community | 1983 |
| St. Mary's Cathedral (Church of Ireland) Tuam : an architectural, archaeological and historical guide | | Monograph or Collective Volume | Friends of St. Mary's Cathedral | 1996 |
| St. Mary's Cathedral, Limerick | Dowd, James, Rev., | Monograph or Collective Volume | George McKern & Sons | 1899 |
| St. Mary's Cathedral, Limerick : unpublished correspondence of the cathedral restoration in the nineteenth century | Mulvin, Lynda | Article in Journal | | 2001 |
| St. Mary's Cathedral, the organ : a short history with specifications | Brislane, B. A. | Monograph or Collective Volume | McKerns Printing | 1971 |
| St. Mary's Catholic Church and Ballyheigue Parish | MacMahon, Bryan | Article in Book | | 2012 |
| St. Mary's Church Cong : a history | Clesham, Brigid | Monograph or Collective Volume | Family Research Centre | 1994 |
| St. Mary's church, Bannow, in 1840 | de Vál, Séamas S. | Article in Journal | | 2013 |
| St. Mary's Church, Julianstown | Daly, Bernie | Monograph or Collective Volume | [St. Mary's Church, Julianstown] | 1995 |
| St. Mary's Collegiate Church Youghal : a brief outline of its history, with some account of its main features | | Monograph or Collective Volume | St. Mary's Church | 1956 |
| St. Mary's Parish Church, Killarney | | Monograph or Collective Volume | [St Mary's Parish Church] | no date given |
| St. Mary's parish church, Newry : its history, memorials, vicars, curates, and churchwardens | Reside, S. Wilson | Monograph or Collective Volume | Newry Telegraph Office [Printer] | 1933 |
| St. Mary's, Church of Ireland, Kilmessan: a short history | Gannon, Mary | Monograph or Collective Volume | | 2011 |
| St. Mary’s Church of Ireland Shinrone | Committee members | Monograph or Collective Volume | St. Mary’s Church of Ireland Shinrone | 2020 |
| St. Matthew's Church, Shankill Parish, Belfast, 1872-1972 | Campbell, A. J. E. | Monograph or Collective Volume | [St. Matthew's Church, Shankill Parish] | 1972 |
| St. Michael's Church - Drumlion - Co. Roscommon, 1856-2006 : church, people and landscape | | Monograph or Collective Volume | Drumlion sesquicentennial Committee | 2006 |
| St. Michael's Church Limerick, 1844-1944 | Jackson, R. Wyse, Rev. | Monograph or Collective Volume | McKern's | 1944 |
| St. Molua's Church, Magheracloone : a short history | Sutcliffe, John L. | Monograph or Collective Volume | | 1990? |
| St. Multose church, Kinsale, as it was, as it is, and as it ought to be. | | Monograph or Collective Volume | Guy and Co. | 1895 |
| St. Patrick's Cathedral Armagh | | Monograph or Collective Volume | Ulster Gazette | 1932 |
| St. Patrick's Cathedral in the age of Swift, 1690-1745 | Barnard, T. C. (Toby Christopher) | Article in Book | | 2009 |
| St. Patrick's Church 1864-1964 | French, Samuel | Monograph or Collective Volume | St. Patrick's Church | 1964 |
| St. Patrick's Church Jordanstown, 1868-1958 | McCappin, William J., Rev. | Monograph or Collective Volume | Northern Whig (printer) | 1958 |
| St. Patrick's Church Jordanstown, 1868-1993 | McCappin, William J., Rev.,Rodgers, Derek | Monograph or Collective Volume | Regency Press (printer) | 1993 |
| St. Patrick's Church, Ballymena : centenary sounvenir of consecration, 1855-1955 | Craig, C. H. B., Rev. | Monograph or Collective Volume | [St Patrick's Church] | 1955 |
| St. Patrick's Church, Ballymena: Centenary souvenir : St Patrick's day, 1853-1953 | St. Patrick's Church | Monograph or Collective Volume | Ecclesiastical Press | 1954 |
| St. Patrick's church, Castle Archdale: a centenary celebration | Chambers, Richard W. | Monograph or Collective Volume | Richard W. Chambers | 2008 |
| St. Patrick's Church, Donabate : centenary celebration | Bates, Peadar | Monograph or Collective Volume | St. Patrick's Church Centenary Committee | 2003 |
| St. Patrick's Church, Monaghan | Berry, Ian | Monograph or Collective Volume | [St Patrick's Church] | 2002 |
| St. Patrick's parish church, Newry, 1578 AD-1978 AD : a short historical guide | Heasley, S. J. | Monograph or Collective Volume | [J. Hollywood Printers] | 1978 |
| St. Patricks Church Aughawillan 1870-2020 | Quinn, Des | Monograph or Collective Volume | St. Patrick's Church Aughawillan | 2020 |
| St. Paul's church, Bray | Turner, M. K. (Kathleen) | Article in Journal | | 1977 |
| St. Peter's : cathedral church of Down and Connor, 1866-2005 | Tracey, DanWard, Sally | Monograph or Collective Volume | [s.n.] | 2005 |
| St. Peter's Church of Ireland Drogheda : a history | Drogheda Union of Parishes | Monograph or Collective Volume | Drogheda Union of Parishes | 2002 |
| St. Peter's parish and the town of Drogheda : a short historical sketch | L., P. | Monograph or Collective Volume | Drogheda Independent Co. | 1913 |
| St. Polycarp's Church, Finaghy: the first fifty years, a brief history 1932-1982 | Hall, James R. | Monograph or Collective Volume | [Finaghy parish] | 1982 |
| St. Saviour's Church Arklow | Whiteside, Lesley | Monograph or Collective Volume | St. Saviour's Arklow | 1997 |
| St. Simon's: 50 years, 1930-1980 | Mason, Edwin | Monograph or Collective Volume | [St Simon's parish] | 1980 |
| St. Werburgh's Church | O'Neill, Michael | Article in Journal | | 2012 |
| St. Wolstan's | Kirkpatrick, W. T. | Article in Journal | | 1899 |
| Stained glass in Enniskillen churches | Rogers, Frank | Article in Journal | | 2004 |
| Stained-glass windows in Clonown church | Murray, Patrick | Article in Book | | 2016 |
| Stair eaglasta Bhaile na Finne | Pádraig Ó Baoighill | Article in Journal | | 2012 |
| State of Raphoe diocese in early 1880s from the documents of 'De Propaganda Fide' | Anonymous | Article in Journal | | 1987 |
| State of the diocese of Kildare and Leighlin - 1800 A.D. | Crowe, Austin | Article in Journal | | 1977 |
| Statement issued by the cardinal primate and the archbishops and bishops of Ireland on the condition of their country | Anonymous | Article in Journal | | 1942 |
| Statement of the Irish hierarchy on the condition of the country | Anonymous | Article in Journal | | 1942 |
| Statement with reference to the efforts made to revive the ancient Bishoprick of Clogher | | Monograph or Collective Volume | W.&G. Baird | 1884 |
| Statuta ecclesiae antiqua and the Gallic councils in the Hibernensis | Davies, Luned Mair | Article in Journal | | 2000 |
| Statutes of the provincial synod of Cashel, 1661 | | Article in Journal | | 1966 |
| Steps on my pilgrim journey : memories and reflections | Daly, Cathal B. | Monograph or Collective Volume | Veritas | 1998 |
| Stone, stucco and papier mâché : fan vaulting from Henry VII's chapel, Westminister Abbey, to Monkstown parish church | McDonnell, Joseph | Article in Book | | 2008 |
| Stonework in Ardmore | Mulcahy, Michael | Article in Journal | | 1986 |
| Stop-Chamfers. The finishing touches of the masons in some medieval churches in Clare | Kearns, Mary
| Article in Journal | | 2012 |
| Storia religiosa dell'Irlanda | | Monograph or Collective Volume | Centro Ambrosiano | 2001 |
| Strabane in the wider world - famous people from the area | Bradley, Jim | Article in Book | | 2000 |
| Strange sermons, 1840-41 : a turbulent priest in Barndarrig and Kilbride | Hannigan, Ken | Article in Journal | | 2015 |
| Strategies of lordship in pre-Norman and post-Norman Leinster | Flanagan, Marie Therese | Article in Journal | | 1998 |
| Structures of import: St Peter’s church, a unique sunken-floored structure and Dublin’s southern suburb | Duffy, Paul | Article in Book | | 2023 |
| Studies in Anglo-Saxon sculpture | Cramp, Rosemary | Monograph or Collective Volume | Pindar | 1992 |
| Studies in Irish legal history | Osborough, W. N. (William Nial) | Monograph or Collective Volume | Four Courts | 1999 |
| Studies in the layout, buildings and art in stone of early Irish monasteries | Herity, Michael | Monograph or Collective Volume | Pindar | 1995 |
| Studying early Christian sculpture in England and Ireland : the object of art history or archaeology? | Hawkes, Jane | Article in Book | | 2009 |
| Studying Early Christian sculpture in England and Ireland: The object of art history or archaeology? | Hawkes, Jane | Article in Journal | | 2009 |
| Style over substance : architectural fashion and identity building in medieval Ireland | Ní Ghrádaigh, Jenifer | Article in Book | | 2012 |
| Styled 'boy-bishop' of Ferns : the life and turbulent times of James Keating, 1783-1849 | Rafferty, Celestine | Article in Journal | | 2010 |
| Summary report on the excavations at St Mary’s cathedral, Limerick, 1992 | Hodkinson, Brian | Article in Journal | | 1996 |
| Survey of recent publications : III, Ecclesiastical history | Ó Fiaich, Tomás | Article in Journal | | 1954 |
| Survivals of organisation of the early Irish church in late medieval and early modern Irish society | Barry, John | Thesis | | 1949 |
| Surviving Death: Spiritual and Somatic Resurrection and Elements of Pauline Eschatology in the Hiberno-Latin Tradition | Millin, Nathan | Thesis | | 2013 |
| Swift : the man, his works, and the age. 3 vols. | Ehrenpreis, Irvin | Monograph or Collective Volume | Methuen | 1983 |
| Swift as an ecclesiastical statesman | Beckett, J. C. (James Camlin) | Article in Book | | 1949 |
| Swift, the church, and the “improvement of Ireland” | Hayton, D. W. (David William) | Article in Book | | 2013 |
| Swifts's deanery income : a new document | Landa, Louis A., 1901- | Article in Book | | 1949 |
| Sword and mitre : government and episcopate in France and England in the age of aristocracy | Ravitch, Norman | Monograph or Collective Volume | | 1966 |
| Swords and district : the political and ecclesiastical background, fifth to twelfth centuries | Mac Shamhráin, Ailbhe | Article in Book | | 2016 |
| Sylvester Lloyd, O.F.M., bishop of Killaloe, 1728-1739 | Murphy, Ignatius | Article in Journal | | 1987 |
| Synod of Bishops 1990 : formation of priests | Lovatt-Dolan, Elizabeth | Article in Journal | | 1990 |
| Synod of Rathbreasail | Anonymous | Article in Journal | | 1986 |
| Synodus II Patricii and vernacular law | Ó Corráin, Donnchadh | Article in Journal | | 2002 |
| Tadhg Mac Eochaidh, easbog Chluain Fearta, 1678-1687 | Mac Fhinn, Pádraig Eric, 1895-1987 | Article in Journal | | 1944 |
| Tales from the crypt : the medieval stonework of Christ Church cathedral, Dublin | Moss, Rachel | Article in Book | | 2002 |
| Tallaght, in the County Dublin | Fitzgerald, Walter, Lord | Article in Journal | | 1908 |
| Tamlaght Parish Church : a short history | Doherty, William Herbert | Monograph or Collective Volume | Forge Books | 1984 |
| Tánaise ríg : the earliest evidence | Dunn, Marilyn | Article in Journal | | 1999 |
| Taney : progress of a parish : a social and historical profile of the parish of Taney in Dublin | Robinson Tweed, Carol | Monograph or Collective Volume | O'Brien Press | 2018 |
| Teach Mo Chua — an early ecclesiastical site at Timahoe, Co. Laois | Corlett, Christiaan | Monograph or Collective Volume | Archaeology Ireland | 2018 |
| Téacsanna draíochta in Éirinn sa mheánaois luath. | Carey, John | Article in Book | | 2000 |
| Teampull na Bhfear nGonta or the Church of the Wounded Men | Talbot, Edgar | Article in Journal | | 1990 |
| Tech Saxan. An Anglo-Saxon monastic settlement in early medieval east Galway | Mannion, Joseph | Article in Journal | | 2008 |
| Temple Finghin, and two unusual vourroirs from Clonmacnoise | Ní Ghrádaigh, Jenifer | Article in Journal | | 2005 |
| Temple House : from Templar castle to New English mansion | Naessens, PaulO'Conor, Kieran | Article in Book | | 2015 |
| Templemartin : a proud tradition | Ó Crualaoí, Sean | Monograph or Collective Volume | [St Martin's Church] | no date given |
| Templetrine Church, a history | O'Connell, Ruth | Monograph or Collective Volume | Templetrine parish | 1985 |
| Ten documents relating to Irish diocesan affairs, 1740-84, from Franciscan Library, Killiney | Giblin, Cathaldus | Article in Journal | | 1978 |
| Terence MacDonald (1810-1874), Tithe farmer, Jigginstown, Naas, County Kildare - a study of person and place | Robinson, James | Article in Journal | | 2011 |
| Terribilis est locus iste: hic domus Dei est et porta coeli : The north portal of Cormac's chapel, Cashel, Co. Tipperary | Ó Riain-Raedel, Dagmar | Article in Book | | 2012 |
| Territoriality and the cult of Saint Ciarán of Saigir | Connon, Anne | Article in Book | | 2016 |
| That Old Time Religion | Logue, Rose Mary | Article in Journal | | 2010 |
| The "Irish Monastery" at North Salem, New Hampshire | Hencken, Hugh O'Neill | Article in Journal | | 1939 |
| The "Monasticon Hibernicum Project" : a research tool for early and medieval ecclesiastical settlement in Ireland | Mac Shamhráin, Ailbhe | Article in Journal | | 2008 |
| The 'Cathedral', Temple Kelly and Temple Ciarán: notes from the annals | MacDonald, Aidan | Article in Book | | 2003 |
| The 'James Flannelly Chalice' : a seventeenth century chalice from the diocese of Killala | Chapple, Robert M. | Article in Journal | | 2000 |
| The 'market cross' at Glendalough | Ó Floinn, Raghnall | Article in Book | | 2011 |
| The 'new' church at Shanballymore | Condon, Gerard | Article in Journal | | 2009 |
| The 'Processus Datariea' and the appointment of Irish bishops in the seventeenth century | Giblin, Cathaldus | Article in Book | | 1957 |
| The 'Rebaptism' of Suibhne | Frykenberg, Brian | Article in Journal | | 2017 |
| The 'tithe war' in Co. Longford in the 1830s | O'Ferrall, Fergus | Article in Journal | | 2013 |
| The 'Wesley' silver | Kingston, Gillian | Article in Book | | 2012 |
| The 1562 collapse of the nave and its aftermath | Stalley, Roger | Article in Book | | 2000 |
| The 1830s tithe riots | Higgins-McHugh, Noreen | Article in Book | | 2011 |
| The 1990 Synod of Bishops : priestly formation | Dalton, William | Article in Journal | | 1990 |
| The 20th century : an age of change and challenge | Forde, Walter | Article in Book | | 1999 |
| The Abbey Church of Bangor | Scott, Charles | Monograph or Collective Volume | W. & G. Baird | 1882 |
| The Abbey of Kilnalahan | Dalton, J. P. | Article in Journal | | 1911 |
| The Abbey of Kilnalahan—II | Dalton, J. P. | Article in Journal | | 1909 |
| The Abbey of Molana, Co. Waterford | Power, Patrick | Article in Journal | | 1932 |
| The abbey of St Thomas the martyr and the le Brun family: piety and patronage in Anglo-Norman Dublin | Foley, Áine | Article in Book | | 2019 |
| The abbey of the Port of St Maria, Dunbrody, Co. Wexford: an architectural study | Stout, Geraldine | Article in Book | | 2016 |
| The act book of the Armagh diocese, 1518-22: a text and introduction | McCafferty, John | Thesis | | 1992 |
| The Act Book of the Diocese of Armagh, 1518-1522 : PRONI, MS DIO/4/2/11 | | Monograph or Collective Volume | Irish Manuscripts Commission | 2020 |
| The activities and personnel of the general committee of the Catholics of Ireland, 1767-84 | MacGeehin, Maureen | Thesis | | 1952 |
| The administration of John Bole, archbishop of Armagh, 1447-1471 | Lynch, Anthony | Article in Journal | | 1991 |
| The administration of religion in medieval Kilkenny | O'Keeffe, Gerry | Article in Journal | | 2015 |
| The administration of the diocese of Dublin during the eighteenth century | Kennedy, Raymond Thomas | Thesis | | 1970 |
| The adventures of Milo Sweteman, archbishop of Armagh 1361-1380 | Smith, Brendan, 1963- | Article in Journal | | 1996 |
| The advowson of the chapel of St. John of Kilbridge Co. Meath | Butler, Theobald Blake | Article in Journal | | 1982 |
| The Afterlife of the Rural Medieval Parish Church in Ireland: To What Extent Did Medieval Parish Church Buildings Survive into the Early Nineteenth Century? | O Neill, Michael | Article in Book | | 2021 |
| The age of Pio Nono : the age of Paul Cullen | Duffy, Eamon, 1947- | Article in Book | | 2011 |
| The alliance between church and state in early medieval Alba | Veitch, Kenneth | Article in Journal | | 1998 |
| The ancient chapter-house of the priory of the Holy Trinity, Dublin | Drew, Thomas | Article in Book | | 1990 |
| The ancient Church and Parish of S. Michan : a sermon preached in S. Michan's Church, Dublin, on Sunday, May 10th, 1891 | Walsh, Robert | Monograph or Collective Volume | J. Charles & Son | 1891 |
| The Ancient Church of St. Nicholas, Carrickfergus, Diocese of Connor: A report to the Right Rev. Robert Knox, D.D., Lord Bishop of Down and Connor and Dromore | Drew, Thomas | Monograph or Collective Volume | W. Erskine Mayne|E. Posonby | 1872 |
| The ancient inscriptions of Kells | Macalister, R. A. S. (Robert Alexander Stewart) | Article in Journal | | 1934 |
| The ancient library of Cashel | Jackson, Robert Wyse | Article in Journal | | 1947 |
| The ancient see-lands of the bishop of Cork in the northern suburbs | Ó Buachalla, Liam | Article in Journal | | 1965 |
| The annals of John de Pembridge as a source for the history of Dublin and its hinterland | Williams, Bernadette | Article in Book | | 2023 |
| The antiquities of Clonmore, County Carlow | Fitzgerald, Walter, Lord | Article in Journal | | 1914 |
| The appointment of Bishop Michael Flannery and proposed revival of Roscrea diocese, 1858 | Murphy, Ignatius | Article in Journal | | 1984 |
| The appointment of Bishop Tyrrell and its consequences | Ó Fiaich, Tomás | Article in Journal | | 1955 |
| The appointment of blessed Oliver Plunket to Armagh | Ó Fiaich, Tomás | Article in Journal | | 1958 |
| The appointment of Catholic bishops in 19th century Ireland | Whyte, J. H. | Article in Journal | | 1962 |
| The appointment of Catholic Bishops to Killaloe Diocese, 1819-50 | Murphy, Ignatius | Article in Journal | | 1983 |
| The appointment of Coabh and Erenagh | Barry, J. G. | Article in Journal | | 1960 |
| The appointment of coarb and erenagh | Barry, J. G. | Article in Journal | | 1960 |
| The appointment of Octavian de Palatio as archbishop of Armagh, 1477-8 | Sughi, Mario A. | Article in Journal | | 1998 |
| The appointments of Patrick Curtis and Thomas Kelly as archbishop and coadjutor archbishop of Armagh | Macaulay, Ambrose | Article in Journal | | 1982 |
| The appointments of the archbishops of Armagh in the nineteenth century | Macaulay, Ambrose | Monograph or Collective Volume | Cumann Seanchais Ard Mhacha | 2008 |
| The archaeology of ecclesiastical estates in early medieval Ireland: a case study of the kingdom of Fir Maige | Ó Carragáin, Tomás | Article in Journal | | 2014 |
| The archaeology of medieval rural ecclesiastical settlement in the barony of Lower Dundalk, County Louth | Ryan, Vanessa | Thesis | | 2009 |
| The archaeology of the early medieval Celtic churches : an introduction | Edwards, Nancy | Article in Book | | 2009 |
| The archaeology of the early medieval Celtic churches : proceedings of a conference on the archaeology of the early medieval Celtic Churches, September 2004 | | Monograph or Collective Volume | Maney Publishing | 2009 |
| The archaeology of the Irish church in the eighth century | Hamlin, Ann | Article in Journal | | 1985 |
| The archaeology of the Irish Hospitaller preceptories of Mourneabbey and Hospital in context | Cotter, Eamonn | Article in Book | | 2015 |
| The archaeology of writing in the time of Adomnán | Campbell, Ewan | Article in Book | | 2010 |
| The archbishop and citizens of Dublin during Hugh de Lacy's Irish rebellion, 1223-4 | Brown, Daniel J. F. | Article in Book | | 2016 |
| The archbishops and administration of the diocese and province of Dublin, 1181-1298 | Murphy, Margaret | Thesis | | 1987 |
| The archbishops of Armagh and Drogheda's 'faire house', 1613-1783 | Usher, Robin | Article in Journal | | 2020 |
| The archbishops of Tuam, 1700-2000 | Waldron, Kieran | Monograph or Collective Volume | Nordlaw Books | 2008 |
| The archbishops, bishops and priests who served in the Archdiocese of Dublin : 1900 to 2011 | Gaughan, J. Anthony, 1932- | Monograph or Collective Volume | Kingdom Books | 2012 |
| The archbishops, bishops and priests who served in the archdiocese of Dublin in the eighteenth century | Gaughan, J. Anthony, 1932- | Monograph or Collective Volume | Kingdom Books | 2013 |
| The archbishops, bishops and priests who served in the archdiocese of Dublin in the nineteenth century | Gaughan, J. Anthony, 1932- | Monograph or Collective Volume | Kingdom Books | 2013 |
| The archbishops, bishops and priests who served in the archdiocese of Dublin in the seventeenth century | Gaughan, J. Anthony, 1932- | Monograph or Collective Volume | Kingdom Books | 2010 |
| The archdeacon of Kells | Brady, John, d.1963 | Article in Journal | | 1947 |
| The archdeacons of Armagh 1417-71 | Lynch, A. | Article in Journal | | 1981 |
| The archdeacons of Kells | Brady, John, d.1963 | Article in Journal | | 1947 |
| The archdeacons of Meath | Brady, John, d.1963 | Article in Journal | | 1945 |
| The architectural history of the medieval cathedral | O'Neill, Michael | Article in Book | | 2009 |
| The architectural setting of the cult of relics in early medieval Ireland | Ó Carragáin, Tomás | Article in Journal | | 2003 |
| The architectural setting of the Mass in early medieval Ireland | Ó Carragáin, Tomás | Article in Journal | | 2009 |
| The Architecture and Art of British and Irish Catholicism | Proctor, Robert | Article in Book | Oxford University Press | 2023 |
| The architecture of Ireland : from the earliest times to 1880 | Craig, Maurice James | Monograph or Collective Volume | Batsford | 1982 |
| The architecture of Ireland from the earliest times to 1880 | Craig, Maurice James | Monograph or Collective Volume | Eason | 1989 |
| The architecture of St Patrick’s cathedral, Dublin | O'Neill, Michael | Article in Journal | | 1995 |
| The Architecture of the 'basilicae sanctorum' of Seventh-century Armach and Kildare | O'Keeffe, Tadhg | Article in Journal | | 2023 |
| The architecture of the cathedral and priory buildings, 1250-1530 | Stalley, Roger | Article in Book | | 2000 |
| The architecture of the Church of Ireland | O'Neill, Michael | Article in Book | | 2013 |
| The Architecture of the Valliscaulian Order in Scotland | Fawcett, Richard | Article in Book | | 2021 |
| The archives of the Catholic diocese of Ferns | De Vál, Séamas S. | Article in Journal | | 2005 |
| The Archives of the Church of Ireland - a retrospect | Refaussé, Raymond | Article in Journal | | 2005 |
| The Ardagh Boys' School | O'Mahoney, Michael | Article in Journal | | 2014 |
| The Ardagh chalice, numerology, and the Stowe missal | Berger, Pamela | Article in Journal | | 1979 |
| The Armagh diocesan archives | Murray, Raymond | Article in Journal | | 1974 |
| The Armagh registers : an under-explored source for late medieval Ireland | Cosgrove, Art | Article in Journal | | 1990 |
| The Armagh registers and the re-interpretation of Irish church history on the eve of the reformations | Jefferies, Henry A. | Article in Journal | | 1999 |
| The arrivals of the Dominicans in Ireland in 1224 and the question of Dublin and Drogheda : the sources re-examined | Williams, Bernadette | Article in Book | | 2013 |
| The articles of the Church of Ireland of 1615 | Wallace, Raymond Leslie | Thesis | | 1949 |
| The Atherton file | Clarke, Aidan | Article in Journal | | 1979 |
| The attitude of contemporary Irish historical writers towards Rinuccini's excommunication of the supporters of the cessation with Inchiquin to the outbreak of the Remonsttrance controversy | Corish, P.J., Rev. | Thesis | | 1952 |
| The Augustinian abbey of St Mary the Virgin, Cong, Co. Mayo | Leask, H. G. (Harold G.) | Article in Journal | | 1941 |
| The Augustinian altar in Kentstown Church | Fleming, Eddie | Article in Journal | | 2014 |
| The Augustinian priory of Kells, Co. Kilkenny : an exploration : a visitor's guide and explanation | Tietzsch-Tyler, Daniel | Monograph or Collective Volume | K.R.E.T.E (Kells Region Economic & tourism Enterprise Ltd) | 1993 |
| The Bangors and Ballyculter: an historical sketch of the Parish of Ballyculter (Strangford) | Kennedy, William E. | Monograph or Collective Volume | [Mourne Observer] (printer) | 1980 |
| The baptismal font of Clonard, Co. Westmeath | Harris, Dorothy C. | Article in Journal | | 1940 |
| The Barnards | | Monograph or Collective Volume | James Hempton | 1897 |
| The basilica in early Ireland | Doherty, Charles | Article in Journal | | 1984 |
| The Bearnán Chúláin bell-shrine from Glenkeen, Co. Tipperary | Murray, Griffin | Article in Journal | | 2016 |
| The beginnings of a national protectorate : curial cardinals and the Irish Church in the fifteenth century | Walsh, K. | Article in Journal | | 1974 |
| The beginnings of the Association of Church Archivists of Ireland | Leyden Leo | Article in Journal | | 2005 |
| The beginnings of the Christian Brothers : their relations with various ecclesiastical authorities | Fitzpatrick, J. D. | Article in Journal | | 1962 |
| The beligerent prelate : an alliance between archbishop Daniel Mannix and Eamon de Valera | Mannix, Patrick | Monograph or Collective Volume | Cambridge Scholars Publishing | 2013 |
| The bells of Saints Caillín and Cuana : two twelfth-century cups | Bourke, Cormac | Article in Book | | 2000 |
| The bells of St Mary's | Crowe, Finbar | Article in Journal | | 1984 |
| The Benedictines in medieval and early-modern Ireland | Ó Clabaigh, Colmán N. | Article in Book | | 2005 |
| The Bible and the Collectio Canonum Hibernensis | Sheehy, Maurice P. | Article in Book | | 1987 |
| The Bible in early modern Gaelic Ireland : tradition, collaboration and alienation | Caball, Marc | Article in Book | | 2015 |
| The Bible used by Adomnán | Picard, Jean-Michel | Article in Book | | 1987 |
| The biblical chronology of James Ussher | McCarthy, D. P. | Article in Journal | | 1997 |
| The biblical iconography of Irish Romanesque architectural sculpture | Harbison, Peter | Article in Book | | 1995 |
| The Big Book | Kostick, Conor | Article in Journal | | 2017 |
| The birthplace and life of St. Brigit of Kildare | Stubbs, F. W. | Article in Journal | | 1902 |
| The bishop in politics : life and career of John MacEvilly, Bishop of Galway 1857-81, Archbishop of Tuam 1881-1902 | Bane, Liam | Monograph or Collective Volume | Westport Historical Society | 1993 |
| The Bishop of Limerick's residence c.1650-1784 | Hodkinson, Brian | Article in Journal | | 2012 |
| The Bishop of Meath and the Ratoath imposter : Thomas Lewis O'Beirne (1748-1823) and Laurence Hynes Halloran (1765-1831) | Comerford, Patrick | Article in Journal | | 2005 |
| The Bishop remembered | Barry, John | Article in Journal | | 1993 |
| The Bishop's Palace, Kilkenny | The Integrated Conservation Group | Article in Journal | | 2003 |
| The bishops of Ossory from the Anglo-Norman invasion to the present day | Moran, Patrick Francis, cardinal, 1830–1911 | Article in Journal | | 1883 |
| The Black Book of Limerick | Russell, C. W. (Charles William) | Article in Book | | 1872 |
| The Blackfriars of Trim, Co. Meath and the legacy of Geoffrey de Geneville | O'Carroll, Finola | Article in Book | | 2019 |
| The Book of Cloyne | | Monograph or Collective Volume | Cloyne Historical and Archaeological Society | 1977 |
| The Book of Fenagh | Walsh, Paul, Revd, 1885-1941 | Article in Journal | | 1940 |
| The Book of Kells, folio 114 | O'Reilly, Jennifer | Article in Book | | 2012 |
| The Book of Obits of Christ Church cathedral, Dublin | Lennon, Colm | Article in Book | | 2006 |
| The boundaries of Clogher | Ó Maolagáin, Pádraig | Article in Journal | | 1953 |
| The bounds and extent of Irish parishes | Power, P. | Article in Book | | 1947 |
| The Breac Maodhóg : a unique medieval Irish reliquary | Murray, Griffin | Article in Book | | 2014 |
| The British government and Archbishop Daniel Mannix | O'Brien, John | Article in Journal | | 1988 |
| The British Government and the appointment of Tomás Ó Fiaich as Archbishop of Armagh | Rafferty, Oliver P. | Article in Journal | | 2014 |
| The building of Bandon Methodist manse | Bateman, GeraldineHarper, LeslieKingston, Doris | Article in Journal | | 2016 |
| The building of Mount St. Joseph's Abbey Church | Hogan, Flannan | Article in Journal | | 1983 |
| The building of St Colman's Cathedral, Cobh | Wilson, Ann | Article in Journal | | 2004 |
| The building of St James' Durrus | Humphreys, Francis | Article in Book | | 1992 |
| The building of the parish church at Glenarm | McDonnell, Hector | Article in Journal | | 1982 |
| The building of two eighteenth-century chapels in the parish of Clonmellon | Fagan, Patrick, 1922-2011 | Article in Journal | | 1987 |
| The Buildings of Ireland : North west Ulster : the counties of Londonderry, Donegal, Fermanagh, and Tyrone. | Rowan, Alistair | Monograph or Collective Volume | | 1979 |
| The built environment and material culture of Ireland in the 1641 Depositions, 1600-1654 | Carlson, Heidi Julia | Thesis | | |
| The burning of the church steeple | C., K. | Article in Journal | | 1996 |
| The Butler archbishops of Cashel | Morris, Thomas | Article in Journal | | 1955 |
| The Caledon Communion Paten | Batchelor, John | Article in Journal | | 2017 |
| The campaign for Catholic emancipation, 1823-9 | Doherty, Gillian M.,O'Riordan, Tomás | Article in Book | | 2011 |
| The cardinal and the professor | Boyne, Patricia | Article in Journal | | 1990 |
| The career of John Prene, Archbishop of Armagh, 1439-43 | Lynch, Anthony | Article in Journal | | 2010 |
| The Career of Michael Boyle, Archbishop and Lord Chancellor of Ireland, 1660-86 | Coleman, Aiden | Thesis | | 2012 |
| The Carlow College priest : from Australasia to the Americas | McEvoy, John | Article in Book | | 2008 |
| The Carnmoney connection : a history of Carnmoney Parish from 1796 - 1985 | Scott, Ernest V. | Monograph or Collective Volume | [Carnmoney Parish] | 1985 |
| The Caroline tradition in the Church of Ireland, with particular reference to Bishop J. Taylor | Bolton, F. R. | Monograph or Collective Volume | SPCK | 1958 |
| The Caroline tradition of the Church of Ireland, with particular reference to Bishop Jeremy Taylor | Bolton, F. R. | Monograph or Collective Volume | | 1958 |
| The case of the incorrigible canon: Dublin's first heresy conviction, 1310, and the rivalry between its cathedral chapters | Callan, Maeve B. | Article in Journal | | 2013 |
| The cathedral artists : a release of creative energy | Griffin, Eltin O. Carm | Article in Book | | 1998 |
| The Cathedral Church of Belfast | Thompson, Herbert Marshall | Monograph or Collective Volume | W. & G. Baird [Printer] | 1925 |
| The cathedral church of Saint Patrick : a history and description of the building | Bernard, J. H. (John Henry), 1860-1927Oulton, J. E. L. | Monograph or Collective Volume | Talbot Press | 1940 |
| The cathedral church of St Fachta | Peters, Christopher | Article in Journal | | 1999 |
| The cathedral church of St Fachtna, Ross | Webster, Charles A. | Monograph or Collective Volume | Guy & Co. | 1927 |
| The cathedral church of St Patrick | Bernard, J. H. (John Henry), 1860-1927 | Monograph or Collective Volume | | 1903 |
| The cathedral church of St Patrick Armagh | Anonymous | Monograph or Collective Volume | Cathedral Church of St Patrick | 1990 |
| The cathedral church of St. Colman's, Cloyne : historical and descriptive | Berry, Hugh F. | Monograph or Collective Volume | Guy & Co. | 1937 |
| The cathedral church of the Holy and Undivided Trinity of Down, Downpatrick | Parkinson, R.E. | Monograph or Collective Volume | Talbot Press (SPCK) [Printers] | 1958 |
| The cathedral church of the Holy Trinity Dublin (Christ Church) : a description of its fabric, and a brief history of the foundation, and subsequent changes | Butler, William, Sir | Monograph or Collective Volume | Elliot Stock | 1901 |
| The Cathedral of St Fin Barre at Cork : William Burges in Ireland | Lawrance, DavidWilson, Ann | Monograph or Collective Volume | Four Courts | 2006 |
| The Cathedral of the Assumption : an outline of its history | O'Toole, James | Article in Book | | 1989 |
| The cathedral renewed | Mc Redmond, Louis | Article in Book | | 1998 |
| The cathedrals of Ireland. Photographs by Cormac Simms | Galloway, Peter | Monograph or Collective Volume | | 1992 |
| The Catholic Church and Ireland in the age of rebellion, 1859-73 | Norman, E. R. | Monograph or Collective Volume | Longmans | 1965 |
| The Catholic church in county Kilkenny 1600-1800 | Ó Ferghail, Fearghus | Article in Book | | 1990 |
| The Catholic clergy and Irish politics in the 1830s and 1840s | Nowlan, Kevin B. | Article in Book | NA | 1974 |
| The catholic clergy and popular politics in the dioceses of Cashel and Emly, 1823-48 | McGrath, Thomas G. | Thesis | | 1980 |
| The Catholic hierarchy and education, 1898-1908 | Wall, Patrick | Article in Journal | | 1981 |
| The Catholic parish of Bovevagh, Diocese of Derry | Donnelly, Philip | Article in Journal | | 2002 |
| The Catholic synods in Ireland, 1600-1690 | Forrestal, Alison | Monograph or Collective Volume | Four Courts | 1998 |
| The Catholic synods: their influences and their influence, 1600-90 | Forrestal, Alison | Thesis | | 1996 |
| The Celtic and Roman traditions : conflict and consensus in the early medieval church | Corning, Caitlin | Monograph or Collective Volume | Palgrave Macmillan | 2006 |
| The Celtic church : is this a valid concept? | Hughes, Kathleen Winifred | Article in Journal | | 1981 |
| The Celtic church of Killerrig, County Carlow | Ffrench, Rev. Canon | Article in Journal | | 1911 |
| The centenary of the synod of Kells | Gwynn, Aubrey | Article in Journal | | 1952 |
| The chalices and books of Kilconnell abbey | Jennings, Brendan | Article in Journal | | 1944 |
| The Chancellorship of medieval Leighlin | O'Brien, Niall C.E.J. | Article in Journal | | 2019 |
| The chantry college, Ardee | Bradley, John, 1954-2014 | Article in Journal | | 1989 |
| The Chapel of Dublin Barracks : three essays with a common thread. I : The Riding House with a steeple : a puzzle connected with Dublin Barracks in the age of Lord Chesterfield; II : Methodist preaching at Dublin Barracks : Methodism and the Army; III : The Garrison Church, Arbour Hill | Ferguson, Kenneth | Article in Journal | | 2006 |
| The chapel of the ford, Belfast | Cassidy, WilliamLawlor, H. C. (Henry Cairnes), 1870-1943 | Article in Journal | | 1945 |
| The chapel of Trinity College Dublin | Whiteside, Lesley | Monograph or Collective Volume | Chapel Committee, Trinity College dublin | 1998 |
| The chapel school | Paterson, T. G. F. | Article in Book | | 2013 |
| The chaplaincy question : the Lord Lieutenant of Ireland versus the Belfast Lunatic Asylum | Griffiths, David V.Prior, Pauline M. | Article in Journal | | 1997 |
| The chapter-books of Cashel cathedral | Seymour, St. John D. | Article in Journal | | 1910 |
| The characteristic features of Irish architecture from early times to the twelfth century | Leask, H. G. (Harold G.) | Article in Journal | | 1936 |
| The Charter of Clare Abbey and the Augustinian 'Province' in Co. Clare | Mac Mahon, Michael | Article in Journal | | 1993 |
| The choosing of Oliver Kelly for the See of Tuam, 1809-15 | Coen, Martin | Article in Journal | | 1978 |
| The Christ of Maghera : a preliminary study of the lintel of the old church of St Lurach at Maghera, County Derry | Crilly, Oliver | Article in Book | | 2000 |
| The Christian impact on early Ireland : place-names evidence | Flanagan, Deirdre | Article in Book | | 1984 |
| The Christianization of Society | Price, Huw | Article in Book | | 2003 |
| The Church | Davies, Richard Garfield | Article in Book | | 2003 |
| The church among two nations : Armagh on the eve of the Tudor reformations | Jefferies, Henry A. | Article in Journal | | 1998 |
| The Church and Parish hall of St Mary's, Kilkenny in the 1950s and 1960s. Interview with George Sherwood | Sherwood, George | Article in Journal | | 2013 |
| The church and secular society | Ó Corráin, Donnchadh | Article in Book | | 2010 |
| The church and the artist : practice and patronage, 1922-45 | Bhreathnach-Lynch, Síghle | Article in Journal | | 1991 |
| The Church and the Easter Rising | Rafferty, Oliver P. | Article in Journal | | 2016 |
| The Church and the two nations in medieval Ireland | Watt, J. A. | Monograph or Collective Volume | University P. | 1970 |
| The church and tower house at Dowth, County Meath | Stout, Geraldine | Article in Book | | 2007 |
| The church courts of Armagh on the eve of the Reformation | Jefferies, Henry A. | Article in Journal | | 1993 |
| The Church in Celtic Britain | Radford, Courtenay Arthur Ralegh, 1900-1998 | Article in Book | | 1965 |
| The church in Dublin : 1940-1965 | Burke Savage, Roland | Article in Journal | | 1965 |
| The church in early medieval Ireland in the light of recent archaeological excavations | | Monograph or Collective Volume | Wordwell | 2015 |
| The church in Gaelic Ireland : thirteenth to fifteenth centuries | Mooney, Canice | Monograph or Collective Volume | Gill & Macmillan | 1969 |
| The church in Gaelic Scotland before the Reformation | MacDonald, Iain G. | Article in Book | | 2014 |
| The Church in Ireland in the mid-fifteenth century | Flanagan, U. G. | Article in Journal | | 1952 |
| The church in Irish society, 400-800 | Hughes, Kathleen | Article in Book | | 2005 |
| The church in late medieval County Louth | Jefferies, Henry A | Article in Book | NA | 2023 |
| The church in medieval Ireland | Watt, John A. | Monograph or Collective Volume | University College Dublin Press | 1998 |
| The Church in nineteenth century Louth | Murtagh, Michael | Article in Journal | | 2020 |
| The church in the English lordship, 1216-1307 | Hand, Geoffrey Joseph | Monograph or Collective Volume | Gill | 1968 |
| The Church in the English lordship, 1216-1307 | Hand, Geoffrey Joseph | Monograph or Collective Volume | Gill | 1968 |
| The church lands of the diocese of Dublin : reconstruction and history | MacCotter, Paul | Article in Book | | 2013 |
| The church lands of the diocese of Limerick: reconstruction and history | McCotter, Paul | Article in Journal | | 2013 |
| The church of Bearach, the grange of Baldoyle and the town of the dark stranger | Duffy, Paul | Article in Book | | 2016 |
| The church of Clonroche | McDonald, Tom | Article in Journal | | 2006 |
| The Church of Ireland : an illustrated history | | Monograph or Collective Volume | Booklink | 2013 |
| The Church of Ireland : ecclesiastical reform and revolution, 1800-85 | Akenson, Donald Harman | Monograph or Collective Volume | Yale University Press | 1971 |
| The Church of Ireland : St Saviour's Church, Arklow | Vanston, W. F. H. | Article in Journal | | 1984 |
| The Church of Ireland and the third Home Rule bill | Scholes, Andrew | Monograph or Collective Volume | Irish Academic Press | 2009 |
| The Church of Ireland episcopate in the eighteenth century : an overview | Falvey, Jeremiah | Article in Journal | | 1993 |
| The Church of Ireland in Belfast its growth, condition, needs. The proposed division of the Diocese of Down and Connor and Dromore: the story of the churches, 1778-1931 / by John Frederick MacNeice.|Also a chapter on St Anne's Cathedral, Belfast, by His honour Judge Thompson | MacNeice, John Frederick | Monograph or Collective Volume | William Mullan & Sons | 1931 |
| The Church of Ireland in County Carlow, 1549-2000 | MacCarthy, R. B. (Robert B.) | Article in Book | | 2008 |
| The Church of Ireland in Victorian Dublin | Crawford, John, 1953-2011 | Monograph or Collective Volume | Four Courts | 2005 |
| The Church of Ireland parish of St. James | MacMahon, Bryan | Article in Book | | 2012 |
| The Church of Ireland Unions of Killinane and Kilconickny, Loughrea County Galway: A History | Kearney, Gerry | Monograph or Collective Volume | The author | 2015 |
| The Church of Ireland: a guide to the United Dioceses of Cashel and Emly, Waterford and Lismore: disestablishment commemoration year 1970 | United Dioceses of Cashel and Emly, Waterford and Lismore | Monograph or Collective Volume | [United Dioceses of Cashel and Emly, Waterford and Lismore] | 1970 |
| The Church of Ireland: politics and social change | Burrows, MichaelMcDowell, John | Article in Book | | 2019 |
| The Church of Saint Patrick in Ulster: a short guide to history | Barry, John | Monograph or Collective Volume | The Diocesan Pilgimage Committee of Down and Dromore | 1961 |
| The church of St John the Evangelist, Dartrey : parish of Ematris, Co. Monaghan | Sirr, W. J. | Monograph or Collective Volume | | 1953 |
| The church of St. Lua or Molua, Friar's Island near Killaloe | Leask, H. G. (Harold G.) | Article in Journal | | 1930 |
| The church of St. Mary and all saints, Glanmire, Co. Cork, 1786-1986 | Glanmire parish | Monograph or Collective Volume | [Church of St Mary, Glanmire] | 1975 |
| The church of the Good Shepherd Sion Mills (parish of Urney) | [Davey, W. E.] | Monograph or Collective Volume | [Parish of Urney] | 1965 |
| The Church of the Immaculate Conception, Barefield. The stained glass windows. The people of Barefield and friends abroad | Kearns, Mary | Article in Journal | | 2009 |
| The Church of the Sacred Heart, Donnybrook : 150th anniversary | Pegum, Colette | Monograph or Collective Volume | Donnybrook Parish | 2016 |
| The church on the corner - Saint Donard's Parish 1900-1990 | Easton, Christopher R.A. | Monograph or Collective Volume | Ulster Services [Printer] | 1990 |
| The church on the Irish ridge : the decay of an Irish-American landmark | Creedon, Daniel | Article in Journal | | 2003 |
| The church on the West of the Bann : the story of Killowen Parish | Maconachie, Alwyn | Monograph or Collective Volume | A Bard Production | 1997 |
| The Church since emancipation : Church building | Kennedy, T. P. | Monograph or Collective Volume | Gill & Macmillan | 1970 |
| The Church since emancipation : Church reorganization | Cunningham, T. P. | Monograph or Collective Volume | Gill & Macmillan | 1970 |
| The church upon the hill : 1892-1992 | O'Loughlin, Joe | Monograph or Collective Volume | [s.n.] | 1992 |
| The church visible and one : a sermon preached before the general synod, May 1932 | Gregg, J. A. F. | Article in Book | | 2004 |
| The Church, 1050–1460 | Ó Clabaigh, Colmán N. | Article in Book | | 2018 |
| The churches and abbeys of Ireland | De Breffny, BrianMott, George | Monograph or Collective Volume | Thames & Hudson | 1976 |
| The churches and emigration from nineteenth-century Ireland | Roddy, Sarah | Thesis | | 2010 |
| The churches and plate of the Church of Ireland in the dioceses of Cashel, Emly, Waterford and Lismore | Butler, David J. | Article in Journal | | 2004 |
| The churches of Armagh | Davies, OliverPaterson, T. G. F. | Article in Journal | | 1940 |
| The Churches of Callan, ancient and modern | Shelly, Thomas | Article in Journal | | 1879 |
| The churches of Cork city : an illustrated history | O'Callaghan, Antóin | Monograph or Collective Volume | History Press Ireland | 2016 |
| The churches of county Cavan | Davies, Oliver | Article in Journal | | 1948 |
| The Churches of county Cavan | Davies, Oliver | Article in Journal | | 2013 |
| The Churches of county Cavan | Davies, OliverPaterson, T.G.F. | Article in Journal | | 2013 |
| The churches of County Clare and the origin of the ecclesiastical divisions in that county | Westropp, Thomas Johnston | Article in Journal | | 1900 |
| The churches of Doneraile | Shine, Michael | Article in Journal | | 1989 |
| The churches of Frederick Darley Jnr: identification and attribution | O'Brien, Colm | Article in Journal | | 2013 |
| The churches of medieval Ireland | Harbison, Peter | Article in Book | | 2008 |
| The churches of North Britain in the first Viking-age | Dumville, David N. | Monograph or Collective Volume | Friends of Whithorn Trust | 1997 |
| The churches, monasteries and burial grounds of the Burren | Swan, D. L. | Article in Book | | 1991 |
| The Churchwardens’ Accounts of the Parishes of St Bride, St Michael Le Pole and St Stephen, Dublin, 1663–1702 | | Monograph or Collective Volume | Four Courts Press | 2020 |
| The cillíní of Aughadown and Kilcoe parishes | Casey, William | Article in Journal | | 2014 |
| The Cistercial monasteries of Ireland revisited | Stalley, Roger | Article in Book | | 2012 |
| The Cistercian Abbey of St Mary de Castro Dei, Fermoy, Co. Cork | O'Sullivan, Denis | Article in Journal | | 1946 |
| The Cistercian abbey of St Mary de Fonte Vivo, diocese of Ross, Co. Cork | O'Sullivan, Denis | Article in Journal | | 1944 |
| The Cistercian monasteries of Ireland : an account of the history, art and architecture of the White Monks in Ireland from 1142 to 1540 | Stalley, Roger | Monograph or Collective Volume | Yale University Press | 1987 |
| The clergy and disestablishment | Clarke, Richard | Article in Book | | 2006 |
| The clergy and the schools | Milne, Kenneth | Article in Book | | 2006 |
| The clergy of the Church of Ireland, 1000-2000 : messengers, watchmen and stewards | | Monograph or Collective Volume | Four Courts | 2006 |
| The clergy of the Diocese of Derry : an index | Daly, Edward
Devlin, Kieran | Monograph or Collective Volume | Four Courts | 2009 |
| The clergy, 1780-1850 | Neely, W. G. (William G.) | Article in Book | | 2006 |
| The clerical lineages of Inis Cathaigh | McInerney, Luke | Article in Journal | | 2013 |
| The Clog-na-fola and some early church hand bells in 'The Beresford Collection' | McAnallen, Brendan | Article in Journal | | 2017 |
| The cloister arcade from Cook Street, Dublin | Ó Héailidhe, P. | Article in Book | | 1988 |
| The coarb and twelfth-century reform | Barry, J. G. | Article in Journal | | 1957 |
| The coarb in medieval times | Barry, J. G. | Article in Journal | | 1958 |
| The coarb in the mediaeval Irish church (circa 1200-1550) | Seymour, St. John D. | Article in Journal | | 1933 |
| The coarbs of Killaloe diocese | Gleeson, Dermot F. | Article in Journal | | 1949 |
| The Collectio Canonum Hibernensis - a Celtic phenomenon | Sheehy, Maurice P. | Article in Book | | 1982 |
| The college chapel in Maynooth | McNamara, Dominic | Article in Book | | 2012 |
| The collegiate church of Iniscathaigh | Gleeson, Dermot F. | Article in Journal | | 1940 |
| The collegiate church of St Nicholas, Galway : a study of the structure | Leask, H. G. (Harold G.) | Article in Journal | | 1936 |
| The Collegiate Church of St. Nicholas Galway | | Monograph or Collective Volume | Hely's Limited [printer] | c. 1942 |
| The Composition for Tithes Act of 1823 : its revenue risk impacts across Ireland | Shaw, Daniel J. | Article in Journal | | 2018 |
| The Congregational church in Mallow | Rutherford, Colman | Article in Journal | | 2012 |
| The conservation of the Romanesque portal at Killaloe : exposing the history of one of Clare's finest carved doorways | Ellis, JasonMoss, Rachel | Article in Journal | | 1999 |
| The constitutions of the diocese of Cashel : "The New Psalter of Cashel" (1737) and three pastoral letters of Archbishop Christopher Butler | | Article in Journal | | 2002 |
| The construction of the Irish annals, 429-466 | Ó Buachalla, Liam | Article in Journal | | 1958 |
| The construction of the medieval cathedral, c.1030-1250 | Stalley, Roger | Article in Book | | 2000 |
| The contribution of Cliff College to the shaping of Irish Methodism in the twentieth century | Todd, S. Kenneth | Monograph or Collective Volume | | 2019 |
| The convention of Druim Ceat (A.U. 575) | Ryan, John | Article in Journal | | 1946 |
| The Convention of Druim Cett | Bannerman, John | Article in Journal | | 1966 |
| The conversion of Britain : religion, politics and society in Britain c.600-800 | Yorke, Barbara, 1951- | Monograph or Collective Volume | Pearson Longman | 2006 |
| The conversion of Connemara and conflict between Paul Cullen and John MacHale | Moffitt, Miriam | Article in Book | | 2011 |
| The conversion of the Vikings of Dublin | Sheldon, Gwendolyn | Article in Book | | 2015 |
| The correspondence of Charles Brodrick (1761-1822), archbishop of Cashel | Jenkins, Deborah | Article in Journal | | 1980 |
| The Craven Widows, 1912-1916 | Bradley-Davies, HélèneO’Brien, Paul | Article in Book | | 2023 |
| The creationof Knockbreda parish church and Belvoir Park | Mackey, Brian | Article in Book | | 2009 |
| The Creggan Presbyterian congregation | McMahon, Kevin | Article in Journal | | 2002 |
| The Crossdrum chalice - 1635 | O'Connell, Philip | Article in Journal | | 1947 |
| The crown of England, the common law, and conflict : the communities of Limerick, 1170-1270 | O'Byrne, Emmett | Article in Book | | 2009 |
| The Cult of Relics in Early Christian Ireland | Wycherley, Niamh | Thesis | | 2012 |
| The curious case of the Council of Sens (594/614) | Halfond, Gregory I. | Article in Journal | | 2021 |
| The current state of Catholic archives in Ireland : an overview | Sheehy, David C. | Article in Journal | | 1995 |
| The date and authorship of the Apgitir Chrabaid : some internal evidence | Ó Néill, P. P. | Article in Book | | 1987 |
| The date of the Ardagh chalice | Rynne, Etienne | Article in Book | | 1987 |
| The date of the round tower at Clonmacnoise | Manning, Conleth | Article in Journal | | 1997 |
| The Davisons, A century by the Roe | Kealey, Donal | Article in Journal | | 2005 |
| The day St Michael's Church was destroyed by fire, Wednesday 28th July 1965 | Clarke, Carl | Article in Journal | | 2007 |
| The De Burgo-O'Malley tomb and chantry chapel at Ballintubber Abbey, Co. Mayo. Parts 1-3 | Higgins, Jim | Article in Journal | | 2013 |
| The deaneries of St. Patrick's | Lawlor, H. J. | Article in Journal | | 1932 |
| The deanery of Tulach Óg | Ó Doibhlin, Éamon | Article in Journal | | 1971 |
| The Derrynaflan and other early Irish eucharistic chalices : some speculations | Ryan, Michael | Article in Book | | 1984 |
| The Derrynaflan hoard and early Irish art | Ryan, Michael | Article in Journal | | 1997 |
| The Derrynaflan paten : discovering an ancient theology | O'Loughlin, Thomas | Article in Book | | 2012 |
| The design of the early thirteenth-century cathedral church of Newtown Trim, Co. Meath | O'Keeffe, Tadhg | Article in Journal | | 2018 |
| The development of the church in the Diocese of Ferns in the twelfth and thirteenth centuries | Colfer, Billy | Article in Book | | 1999 |
| The development of women’s ministry in the Church of Ireland | Kennerley, Ginnie | Article in Book | | 2019 |
| The devotional revolution in Ireland, 1850-75 | Larkin, Emmet | Article in Journal | | 1972 |
| The Diamond : a north Armagh parish | Fleming, W. E. C. | Monograph or Collective Volume | W.E.C. Fleming | 2009 |
| The diocesan clergy of Ferns : some reflections | Gahan, John | Article in Book | | 1999 |
| The diocesan history of Killaloe, Kilfenora, Clonfert and Kilmacduagh [AD 639-AD 1886] | Cooke, Edward Alexander | Monograph or Collective Volume | Ponsonby and Weldrick | 1886 |
| The diocesan records of Cloyne, Co. Cork : an unlikely source of genealogical significance in the Representative Church Body Library, Dublin | Hood, Susan | Article in Journal | | 1997 |
| The diocesan school of Armagh & Connor : on the demolition of the building in Ballymena with an antecedent history in Carrickfergus | Dunlop, Eull | Article in Journal | | 1992 |
| The diocese of Cork and the great western schism | Bolster, M. A. | Article in Journal | | 1966 |
| The diocese of Dublin in the sixteenth century : clerical opposition and the failure of the Reformation | Murray, James | Article in Book | | 2000 |
| The diocese of Elphin : people, places and pilgrimage | Beirne, Francis | Monograph or Collective Volume | Columba | 2000 |
| The diocese of Elphin in 1637 | McGreevy, John | Article in Journal | | 1988 |
| The diocese of Emly | Seymour, St. John D. | Monograph or Collective Volume | | 1913 |
| The diocese of Kerry (formerly Ardfert) | Reidy, Donal A. | Monograph or Collective Volume | Catholic Truth Society | 1937 |
| The diocese of Kerry, formerly Ardfert: working in the fields of God | O'Shea, Kieran | Monograph or Collective Volume | Editions du Signe | 2005 |
| The diocese of Kilmore : bishops and priests, 1136-1988 | MacKiernan, Francis J. | Monograph or Collective Volume | | 1989 |
| The Diocese of Kilmore : c.1100-1800 | Kelly, Liam | Monograph or Collective Volume | Columba Press | 2017 |
| The diocese of Kilmore : its history and antiquities | O'Connell, Philip | Monograph or Collective Volume | Browne and Nolan | 1937 |
| The diocese of Kilmore, the Irish college in Paris and Alexander McCabe | Walsh, Micheline | Article in Journal | | 1979 |
| The diocese of Limerick in the twelfth century | Gwynn, Aubrey | Article in Journal | | 1946 |
| The diocese of Lismore, 1801-69 | MacCarthy, R. B. (Robert B.) | Monograph or Collective Volume | Four Courts | 2008 |
| The diocese of Meath during the episcopacy of John Cantwell, 1830-1866 | Connell, Paul | Thesis | | 2002 |
| The diocese of Meath in the 18th century | Fagan, Patrick, 1922-2011 | Monograph or Collective Volume | Four Courts | 2001 |
| The diocese of Meath in the fifteenth century | French, Noel E. | Article in Journal | | 2012 |
| The diocese of Meath under Bishop John Cantwell, 1830-66 | Connell, Paul | Monograph or Collective Volume | Four Courts | 2004 |
| The Diocese of Ross | Webster, Charles A. | Monograph or Collective Volume | | 1924 |
| The diocese of Tir Brun (Kilmore) in the middle ages. Pt. 1 | Parker, Ciarán | Article in Journal | | 1997 |
| The disputed primacy of the medieval Irish church | Watt, J. A. | Article in Book | | 1988 |
| The dissolution to the foundation of St Anthony's College, Louvain, 1534-1607 | Lennon, Colm | Article in Book | | 2009 |
| The distinction between coarb and erenagh | Barry, J. G. | Article in Journal | | 1960 |
| The Dominican Priory of saints Peter and Paul, Athenry: high-medieval history and architecture | McKeon, Jim | Article in Journal | | 2009 |
| The Donegal churches of Liam McCormick | McLaughlin, Liam S. | Article in Journal | | 2011 |
| The double-armed cross on the church gable in Co. Clare | Harbison, Peter | Article in Journal | | 1976 |
| The Doughnambraher font : relic of an ancient ecclesiastical site? | MacMahon, Michael | Article in Journal | | 1984 |
| The downfall of the Woods family | Madden, Gerard | Article in Book | | 1993 |
| The dual of siun and delict - penance to God, penalty to men - a legal perspective | Bemmer, Jaqueline | Article in Journal | | 2018 |
| The Dublin annals of Prior John de Pembridge OP and his Dominican continuator : an account of Irish affairs, 1162-1370 | | Monograph or Collective Volume | Four Courts Press | 2024 |
| The Dublin city churches of the Church of Ireland | Wheeler, H. A. | Monograph or Collective Volume | A.P.C.K. | 1948 |
| The Dublin Diocesan Archives | Sheehy, David C. | Article in Journal | | 2005 |
| The Dublin liberties, 1600-1850 | Milne, Kenneth | Monograph or Collective Volume | Four Courts | 2009 |
| The duties of Coarb and Erenach | Barry, J. G. | Article in Journal | | 1960 |
| The duties of coarbs and erenaghs | Barry, J. G. | Article in Journal | | 1960 |
| The earliest Irish churches | Radford, Courtenay Arthur Ralegh, 1900-1998 | Article in Journal | | 1977 |
| The earliest Presbyterian register of Waterford, 1761-1813 | | Article in Journal | | 1981 |
| The early Christians in Britain | Dodd, B. E.Heritage, T. C. | Monograph or Collective Volume | | 1966 |
| The early church | Walsh, John R. | Article in Book | | 2000 |
| The early church in Offaly | FitzPatrick, Elizabeth | Article in Book | | 1998 |
| The early church in the south-west of Ireland : settlement and organisation | Hurley, Vincent | Article in Book | | 1982 |
| The early church in Wales and the West : recent work in early Christian archaeology, history and place-names | | Monograph or Collective Volume | | 1992 |
| The early ecclesiastical complexes of Carrowmore and Clonca and their landscape context in Inishowen, county Donegal | Adams, MaxHaycock, DebO'Brien, ColmO'Meara, DonPennie, Jack | Article in Journal | | 2014 |
| The early history of St. Thomas' Abbey, Dublin | Gwynn, Aubrey | Article in Journal | | 1954 |
| The early Irish church : problems of identification | Hamlin, Ann | Article in Book | | 1992 |
| The early Irish church : some observations on pastoral care and dues | Etchingham, Colmán | Article in Journal | | 1991 |
| The early Irish church and marriage : an analysis of the "Hibernensis" | Tatsuki, Akiko | Article in Journal | | 2001 |
| The early Irish Church and the Western patriarchate | Corish, Patrick J. | Article in Book | | 1984 |
| The early Irish churches : some aspects of organization | Ó Corráin, Donnchadh | Article in Book | | 1981 |
| The early Irish Stowe Missal's destination and function | Meeder, Sven | Article in Journal | | 2005 |
| The early mediaeval Gaelic lawyer | Charles-Edwards, T. M. (Thomas Mowbray) | Monograph or Collective Volume | Department of Anglo-Saxon, Norse and Celtic, University of Cambridge | 1999 |
| The early medieval church, Templemartin. New archaeological evidence | Herriott, David | Article in Journal | | 2020 |
| The early medieval ecclesiastical enclosures of Dublin: exploring their character, chronology and evolving function in light of excavations across Ireland. | Harney, Lorcan | Article in Book | | 2020 |
| The early penal days : Clogher under the administration of Hugh MacMahon, (1701-1715) | Jefferies, Henry A. | Article in Book | | 2005 |
| The early photographic study of the eighteenth century St. Fin Barre's Cathedral | Rynne, ColinWigham, Billy | Article in Journal | | 2002 |
| The East Window at Collon Church of Ireland | Rountree, John | Article in Journal | | 2021 |
| The Easter Controversy of late antiquity and the early middle ages : its manuscripts, texts and tables. Proceedings of the 2nd international conference on the science of computus in Ireland and Europe. Galway, 18-20 July, 2008 | | Monograph or Collective Volume | Brepols | 2011 |
| The Eastern Mediterranean and the Western provinces : a British perspective | Thomas, Charles | Article in Book | | 1994 |
| The ecclesiastical antiquities of Brigown : with a sketch of the life of St. Fíndchua : a lecture | Moore, Courtenay, Rev. | Monograph or Collective Volume | J. Charles & Son, Printer. At the office of the Irish Ecclesiastical Gazette | 1891 |
| The ecclesiastical architecture of Ireland anterior to the Anglo-Norman invasion, comprising an essay on the origin and uses of the round towers of Ireland | De Paor, LiamPetrie, George | Monograph or Collective Volume | [s.n.] | 1970 |
| The ecclesiastical architecture of Ireland to the close of the twelfth century | Brash, R. R. | Monograph or Collective Volume | [s.n.] | 1875 |
| The ecclesiastical families of Cloyne | Ó Buachalla, Liam | Article in Journal | | 1945 |
| The ecclesiastical sites at Carrowmore in Inishowen | Lacy, Brian | Article in Journal | | 2010 |
| The ecclesiastical structure, 1714-60 | McCracken, J. L. | Article in Book | | 1986 |
| The economy and industry of early medieval Clonmacnoise : a preliminary view | King, Heather | Article in Book | | 2009 |
| The embroidered cloths of heaven : the textiles | Heckett, Elizabeth Wincott | Article in Book | | 2004 |
| The emergence of the Irish Episcopal Conference 1788-1882 | Murphy, Pádraig | Article in Journal | | 2009 |
| The emergence of the Irish Episcopal Conference 1788-1882 | Murphy, Pádraig | Article in Journal | | 2009 |
| The emergence of the metropolitan see : Dublin, 1111-1216 | Mac Shamhráin, Ailbhe | Article in Book | | 2000 |
| The end of the middle ages : Gothic survival in sixteenth-century Connacht | Stalley, Roger | Article in Journal | | 2003 |
| The end of the old order, 1745-1846 | Milne, Kenneth | Article in Book | | 2009 |
| The English reformation in Dublin | Jefferies, Henry A. | Article in Journal | | 2016 |
| The enlightened religion of Robert Clayton | Leighton, C. D. A. | Article in Journal | | 1995 |
| The enrichment of Church of Ireland churches with stained glass and decoration | Lawrence, David | Article in Book | | 2013 |
| The Ensors and the Session House, Roscommon Town | Siggins, Albert | Article in Journal | | 1994 |
| The episcopal succession in England, Scotland and Ireland, A.D. 1400 to 1875 | Brady, W. Maziere | Monograph or Collective Volume | Gregg | 1971 |
| The episcopal succession in Ireland during the first years of Elizabeth's reign | Murphy, N. | Article in Journal | | 1883 |
| The episcopal succession of Killaloe | Clancy, John | Article in Journal | | 1941 |
| The episcopal succession of Killaloe diocese | Gleeson, Dermot F. | Article in Journal | | 1942 |
| The Episcopal Union of Armagh and Clogher: a letter to the Earl of Erne from the Primate on the impolicy of dissolving it | Beresford, M. G. | Monograph or Collective Volume | McWatters [printer] | 1881 |
| The Erenagh in the monastic Irish church | Barry, John | Article in Journal | | 1958 |
| The erenagh in the monastic Irish church | Barry, J. G. | Article in Journal | | 1958 |
| The establishment of Tuam as an archdiocesan capital in the twelfth century | Murray, Griffin | Article in Book | | 2014 |
| The Eucharistic Congress, Dublin 1932 | O'Dwyer, Rory | Monograph or Collective Volume | Nonsuch | 2009 |
| The Evangelicals in the Church of Ireland, 1784-1859 | Acheson, Alan | Thesis | | |
| The evolution of Catholic parishes in Dublin city from the sixteenth to the nineteenth centuries | Ó Fearghail, Conchubhair | Article in Book | | 1992 |
| The evolution of Ferns Diocese | Culleton, Edward | Article in Book | | 1999 |
| The evolution of the Catholic parishes in County Wexford [part 1] | Culleton, Edward | Article in Journal | | 2007 |
| The Evolution of the Diocese of Killaloe | Mac Mahon, Michael | Article in Journal | | 2021 |
| The excavation of Clonrush church, near Whitegate, Co. Clare | McCarthy, Caron | Article in Journal | | 1991 |
| The exclave parish and the geography of episcopacy in Ireland: 600 to 1300 | MacCotter, Paul | Article in Book | Four Courts Press | 2018 |
| The exempt jurisdiction of Newry and Mourne : the struggle for episcopal authority | Rankin, J. Frederick | Article in Journal | | 1998 |
| The extent of Coarb and Erenach in Gaelic Ulster | Barry, J. G. | Article in Journal | | 1960 |
| The failed attempts to implement a native rector at the Irish College in Rome, 1773–98 | | Article in Journal | | 2014 |
| The family of Comedinus Offercheran, the authority of the Archbishop of Armagh and the dispute over the rectory of Tamlaghtlege, 1414-1449 | Sughi, Mario A. | Article in Journal | | 1996 |
| The Famine and its consequences | Madden, Gerard | Article in Book | | 1993 |
| The famine and the development of the Church in Scotland | Handley, J. E. | Article in Journal | | 1947 |
| The Famine in Ardcarne | Tonra, Henry
| Article in Journal | | 1996 |
| The Fasti of St. Patrick's, Dublin. | Lawlor, H. J. (Hugh Jackson), 1860-1938 | Monograph or Collective Volume | | 1930 |
| The finding of the De Burgo-O’Malley chalice | Byrne, Michael | Monograph or Collective Volume | | 2023 |
| The Fingall family link with Douai Abbey Woolhampton, Berkshire, England and Killeen/Dunsany Parish, Co. Meath, Ireland | Carty, Mary Rose | Article in Journal | | 2018 |
| The Finglas vestry book, 1657-1758 | Ní Mhurchadha, Maighréad | Article in Journal | | 2010 |
| The first bishops of Dublin | Gwynn, Aubrey | Article in Journal | | 1955 |
| The first bishops of Dublin | Gwynn, Aubrey | Article in Book | | 1990 |
| The first chapter act book of Christ Church Cathedral, Dublin 1574-1634 | | Monograph or Collective Volume | Four Courts | 1997 |
| The first hundred years, being a history of St. Mark's Parish Church, Ballysillan, Belfast | Macourt, William A. | Monograph or Collective Volume | [St. Mark's Parish, Ballysillan] | 1952 |
| The first synod of Cashel | Gwynn, Aubrey | Article in Journal | | 1946 |
| The first Vatican Council, the Papal State and the Irish hierarchy : recent research on the pontificate of Pope Pius IX | Walsh, Katherine | Article in Journal | | 1982 |
| The formal relationships of insular early medieval eucharistic chalices | Ryan, Michael | Article in Journal | | 1990 |
| The formation and development of intramural churches and communities in medieval Dublin in a European context | Empey, C. A. (Adrian) | Article in Book | | 2009 |
| The formation of a parish : the case of Beaulieu, County Louth | Brand, Paul | Article in Book | | 1988 |
| The formation of the diocese | Devlin, Ciarán | Article in Book | | 2000 |
| The formation of the medieval church in Limerick | Fleming, John | Article in Book | | 2009 |
| The Fottrell papers 1721-39 : an edition of the papers found on the person of Fr John Fottrell, provincial of the Dominicans in Ireland, at his arrest in 1739 | | Monograph or Collective Volume | | 1980 |
| The foundation legend of Laurencekirk revisited | Clancy, Thomas Owen | Article in Journal | | 1999 |
| The foundation of the Cistercian Abbey of Dunbrody, Co. Wexford and its historical context | Doyle, Ian | Article in Journal | | 1992 |
| The foundation plaque of the Irish College in Santiago de Compostela | O’Scea, Ciaran | Article in Journal | | 2020 |
| The founding of the village of Mountshannon | Madden, Gerard | Article in Book | | 1993 |
| The Franciscan convents in Connacht. With notes thereon | Blake, Martin J. | Article in Journal | | 1928 |
| The Franciscan petition lists : diocese of Armagh 1670-71 | Campbell, Patrick J. | Article in Journal | | 1992 |
| The Franciscans in Ireland, 1400-1534 : from reform to reformation | Ó Clabaigh, Colmán N. | Monograph or Collective Volume | Four Courts | 2002 |
| The Fransciscans in Antrim | Conlan, Pat | Article in Journal | | 2013 |
| The fraternity of St Anne in St Audoen's parish, Dublin | Lennon, Colm | Article in Book | NA | 2012 |
| The Friars in Ireland, 1224-1540 | Ó Clabaigh, Colmán N. | Monograph or Collective Volume | Four Courts | 2012 |
| The Friarstown font | Clarke, Tommy | Article in Journal | | 2007 |
| The Friarstown font | Clarke, Tommy | Article in Journal | | 2007 |
| The friary of Muckross, commonly called 'Muckross Abbey' | Leask, H. G. (Harold G.) | Monograph or Collective Volume | The Stationery Office | 1941 |
| The Friends' meeting house : an historical survey of the places of worship of the Society of Friends (Quakers), from the days of their founder George Fox, in the 17th century, to the present. | Lidbetter, Hubert | Monograph or Collective Volume | | 1979 |
| The frontiers of church reform in the British Isles, 1170-1230 | Smith, Brendan, 1963- | Article in Book | | 2002 |
| The furnishings of the Honan chapel, Cork, 1915-16 | Lamb, Peter | Article in Book | | 2004 |
| The Furrow : navigating the rapids, 1950-77 | Horgan, John | Article in Book | | 2014 |
| The future returns : a journey with Columba and Augustine of Canterbury | McMaster, Johnston | Monograph or Collective Volume | Corrymeela Press | 1997 |
| The gardeners of the Early Christian period | Ó Gaoithin, Seán | Article in Journal | | 2011 |
| The genesis of the diocese of Clogher | Lawlor, H. J. (Hugh Jackson), 1860-1938 | Article in Journal | | 1917 |
| The genesis of the dioceses of Derry and Raphoe | Lawlor, H. J. (Hugh Jackson), 1860-1938 | Article in Journal | | 1917 |
| The Geraldines and the Irish : intermarriage, ecclesiastical patronage and status | Booker, Sparky | Article in Book | | 2016 |
| The Ghosts of Archbishop Marsh, Swift and Stella | Walsh, Dave | Article in Journal | | 2008 |
| The Glens of Antrim Historical Society and Carrickfergus and District Historical Society Joint Project | Hulme, John | Article in Journal | | 2014 |
| The globalisation of God : Celtic Christianity's nemesis | Harper, TessMolloy, Dara | Monograph or Collective Volume | Aisling Publications | 2009 |
| The golden jubilee book of St. Peter's Church, Belfast, 1900 - 1950 | Breene, R. S. | Monograph or Collective Volume | [St Peter's Church] | 1900 |
| The Gospel Book in Celtic lands before AD 850 : contents and arrangement | McGurk, Patrick | Article in Book | | 1987 |
| The Gospel Book of Macregol of Birr | Hogan, Margaret | Article in Journal | | 2009 |
| The gospel in glass : All Saints' Church, Portsalon, in the parish of Clondevaddock, County Donegal | McDonald, G. A. | Monograph or Collective Volume | [G.A. McDonald] | 1976 |
| The Gothic revival in the Diocese of Armagh and the influence of John Murray, architect and surveyor | Geraghty, Peter J. | Article in Journal | | 2021 |
| The gravestone inscriptions of the cathedral cemetery of Cloyne, Co. Cork | Henchion, Richard | Monograph or Collective Volume | Cloyne Literary and Historical Society | 1999 |
| The greatest monastic establishment in Mayo | Forde, Brendan | Article in Journal | | 1987 |
| The growth and origin of the diocese of Meath | Brady, John, d.1963 | Article in Journal | | 1949 |
| The growth of the Archdiocese of Tuam | Knox, H. T. (Hubert Thomas) | Article in Journal | | 1903 |
| The hand-bells of the early western church | Bourke, Cormac | Article in Book | | 1994 |
| The heritage of Drumbo | Rankin, J. F. | Monograph or Collective Volume | Parish Restoration Fund | 1981 |
| The hermits and anchorites of medieval Dublin | Ó Clabaigh, Colmán N. | Article in Book | | 2010 |
| The Hibernensis. A study, edition, and translation, with notes. | Flechner, Roy | Thesis | | |
| The High Altar in Sligo Dominican Abbey | Higgins, Jim | Article in Journal | | 2022 |
| The historical links of Drum south Roscommon with the 31st International Eucharist Congress, Dublin 1932 | Drum Heritage Group | Monograph or Collective Volume | Drum Heritage Group | 2002 |
| The historiography of the papers of Bishop James Doyle OSB, 1786-1834, in the Kildare and Leighlin diocesan archives | McGrath, T. G. | Article in Journal | | 1988 |
| The historiography of the twelfth-century reform | Irwin, L. | Article in Journal | | 1985 |
| The history and antiquities of the diocese of Ossory | Carrigan, William, 1860-1924 | Monograph or Collective Volume | [s.n.] | 1981 |
| The history and antiquities of the diocese of Ossory. 1:Introduction and Extent, Deaneries, Bishops, Chapter and Colleges of the diocese of Ossory; 2 : Northern Deanery of Ossory Diocese; 3 : The Middle Deanery, including the Cathedral City of the Diocese of Ossory; 4 : The Southern Deanery of the Diocese of Ossory. 4 vols. | Carrigan, William, 1860-1924 | Monograph or Collective Volume | | 1905 |
| The history and provenance of two early medieval crosiers ascribed to Clonmacnoise | Murray, Griffin | Article in Journal | | 2021 |
| The history of St. Michael's Church, Clonoe, and notes on the parish | Dilworth, Wilfred James | Monograph or Collective Volume | Gortreagh Printing [printer] | 2002 |
| The history of the construction of Tuam Cathedral | Higgins, Patrick | Article in Journal | | 2010 |
| The History of the Parish of Glendermott | Coulter, J. A. | Monograph or Collective Volume | Derry Journal Ltd. {Printer) | 1958 |
| The history, architecture and antiquities of the cathedral church of St Canice, Kilkenny | Graves, JamesPrim, J. G. A. | Monograph or Collective Volume | | 1857 |
| The Holy Ghost friary, Waterford : an architectural account | Lumley, I. W. J. | Article in Journal | | 1982 |
| The holy island of Loch Cré: Monaincha, the thirty-first wonder of the world | Cunningham, George | Article in Book | | 2012 |
| The Holy Man of Ballyvourney | Tourney, Christopher P. | Article in Journal | | 1985 |
| The Holy See, British policy and the plan of campaign in Ireland, 1885-93 | Macaulay, Ambrose | Monograph or Collective Volume | Four Courts | 2002 |
| The Holy Well and the Cross: sacred objects in the sacred space of Drumline Churchyard | Cronin, John J. | Article in Journal | | 2024 |
| The Honan chapel : a golden vision | | Monograph or Collective Volume | Cork University Press | 2004 |
| The Honan chapel : an iconographic excursus | Hawkes, Jane | Article in Book | | 2004 |
| The Honan chapel : the architectural background | Larmour, Paul | Article in Book | | 2004 |
| The Honan chapel : the artistic and cultural content | Larmour, Paul | Article in Book | | 2004 |
| The Honan Chapel, Cork : a shrine to the Irish arts and crafts movement | Larmour, Paul | Article in Journal | | 2002 |
| The Honan chapel, University College, Cork | O'Kelly, M. J. (Michael Joseph) | Monograph or Collective Volume | Cork University Press | 1967 |
| The house that Martin built. The building of Glezz Parochial House | Sands, John Joe | Article in Journal | | 1993 |
| The Hugh Jackson Lawlor archive in the Representative Church Body Library [with index | Breen, Aidan | Article in Journal | | 2013 |
| The Hunt Museum Limerick - North Thomond church silver 1425-1820, September-November 2000 | Hunt Museum, Limerick | Monograph or Collective Volume | The Hunt Museum | 2000 |
| The iconography of the southern lunette in Ardmore Cathedral, Co. Waterford | O'Connor, Donal | Article in Journal | | 2008 |
| The idea of a diocesan history | Gleeson, E. F. | Article in Journal | | 1941 |
| The implications of 'paruchia' | Etchingham, Colmán | Article in Journal | | 1993 |
| The implications of Rath Breasail synod regarding Ardagh and adjacent dioceses as then projected | Connellan, Mark | Article in Journal | | 1943 |
| The indictment of Fr. John Preston, Franciscan | | Article in Journal | | 1963 |
| The influence of alabaster carvings on medieval sculpture in Ennis friary. | Harbison, PeterHunt, John | Article in Journal | | 1977 |
| The influence of Irish monks on Merovingian diocesan organization | Bittermann, Helen Robbins | Article in Journal | | 1935 |
| The Influence of Pilgrimage on Artistic Traditions in Medieval Ireland | Garton, Tessa | Article in Book | | 2007 |
| The influence of the Huguenots on educated Ireland : Huguenot books in Irish church libraries of the eighteenth century | McKee, Jane | Article in Book | | 2006 |
| The inscriptions on the Cross of the Scriptures at Clonmacnois, County Offaly | Harbison, Peter | Article in Journal | | 1979 |
| The Institutional Church | Cubitt, Catherine | Article in Book | | 2009 |
| The interaction of politics, settlement and church in medieval Ireland : Uí Maine as a case study | Grabowski, Kathryn | Thesis | | |
| The Iorwerth triads | Roberts, Sara Elin | Article in Book | | 2011 |
| The Irish alternative : Scottish and English Presbyterianism in Ireland | Armstrong, Robert | Article in Book | | 2013 |
| The Irish Augustine : De Mirabilibus Sacrae Scripturae | MacGinty, Gerard | Article in Book | | 1987 |
| The Irish Augustinians in England and Scotland, 1539-1992 : the Irish province-restorer of its Anglo-Scottish mother province | Hackett, Michael Benedict | Article in Book | | 1994 |
| The Irish barn church | Bradley, John, Rev. | Article in Journal | | 2008 |
| The Irish Benedictines : a history | | Monograph or Collective Volume | Columba | 2005 |
| The Irish cathedral in the 12th century : the dioceses of Limerick and Killaloe | Gem, Richard | Article in Book | | 2011 |
| The Irish Catholic Episcopal Corps, 1657-1829: a prosopographical analysis | Derr, Eric | Thesis | | 2014 |
| The Irish church and taxation in the fourteenth century | Lydon, James F. | Article in Journal | | 1965 |
| The Irish church and taxation in the fourteenth century | Lydon, James F. | Article in Journal | | 1964 |
| The Irish church and the papacy | Corish, Patrick J. | Article in Journal | | 1979 |
| The Irish church and the Tudor reformations | Jefferies, Henry A. | Monograph or Collective Volume | Four Courts | 2010 |
| The Irish Church Disestablishment Act (1869) and the general synod of the Church of Ireland (1871) : the art and structure of educational reform | McCormack, Christopher F. | Article in Journal | | 2018 |
| The Irish church in the eleventh and twelfth centuries | Gwynn, AubreyO'Brien, Gerard | Monograph or Collective Volume | | 1992 |
| The Irish church in the middle ages | Watt, John A. | Article in Book | | 2002 |
| The Irish church in the twentieth and twenty-first centuries | Von Prondzynski, Ferdinand | Article in Book | | 2006 |
| The Irish church, its reform and the English invasion | Ó Corráin, Donnchadh | Monograph or Collective Volume | Four Courts Press | 2017 |
| The Irish Cistercian documents in Octavian's Register, Armagh | Conway, Colmcille | Article in Journal | | 1957 |
| The Irish College, Rome, and its world | | Monograph or Collective Volume | Four Courts | 2008 |
| The Irish colleges on the continent and the creation of an educated clergy | Brockliss, Laurence W. B. | Article in Book | | 2010 |
| The Irish contribution to the penitential tradition | Meens, Rob | Article in Book | | 2016 |
| The Irish convent chapel: the inspiration, design and patronage | Gilmartin, John Patrick Maiben | Thesis | | 2001 |
| The Irish Dominican province (1765-1778) | Fenning, Hugh | Article in Journal | | 1979 |
| The Irish Dominican province (1778-1785) | Fenning, Hugh | Article in Journal | | 1985 |
| The Irish Dominican Province 1785-1797 | Fenning, Hugh | Article in Journal | | 1986 |
| The Irish Dominicans, 800 years, 1224-2024 | Crotty, Terence | Monograph or Collective Volume | Dominican Publications | 2025 |
| The Irish episcopate and pastoral care, 1318-1534 | Burrows, Michael | Thesis | | 1986 |
| The Irish establishment : 1879-1914 | Campbell, Fergus | Monograph or Collective Volume | Oxford University Press | 2009 |
| The Irish Franciscan province : from foundation to the aftermath of the Bruce invasion | Gallagher, Niav | Article in Book | | 2010 |
| The Irish Franciscans in Prague 1629-1786 : history of the Franciscan College of the Immaculate Conception of the Virgin Mary in Prague | Kucharova, HedvikaParez, Jan | Monograph or Collective Volume | Charles University | 2015 |
| The Irish Franciscans, 1534-1990 | | Monograph or Collective Volume | Four Courts | 2009 |
| The Irish Franciscans, 1600-1700 | Gillespie, Raymond | Article in Book | | 2009 |
| The Irish high cross : morphology and iconography | Roe, H. M. | Article in Journal | | 1965 |
| The Irish in England and on the Continent in the seventh century: Part I|The Irish in England and on the Continent in the seventh century: Part II | Wood, I.N. | Article in Journal | | 2016 |
| The Irish in the western Carolingian empire (according to James F. Kenny and Bern, Burgerbibliothek 363) | Contreni, John J. | Article in Book | | 1982 |
| The Irish in war and peace, A.D. 400-800 | Rynne, Etienne | Article in Book | | 2002 |
| The Irish Peter Lombard | Silke, John J. | Article in Journal | | 1975 |
| The Irish precedent for English church reform : the Church Temporalities Act of 1833 | Brose, O. J. | Article in Journal | | 1956 |
| The Irish Presbyterian mind : conservative theology, evangelical experience, and modern criticism, 1830-1930 | Holmes, Andrew R. | Monograph or Collective Volume | Oxford University Press | 2018 |
| The Irish remonstrance of 1317 : an international perspective | Phillips, J.R.S. (John Roland Seymour) | Article in Journal | | 1990 |
| The Irish university question of the 19th century | Moody, T. W. (Theodore William), 1907-1984 | Article in Journal | | 1958 |
| The Irish, the Virgin Mary and Proclus of Constantinople | Weeda, Peter
| Article in Journal | | 2012 |
| The island of St. Patrick : church and ruling dynasties in Fingal and Meath, 400-1148 | | Monograph or Collective Volume | Four Courts | 2004 |
| The Italian connection : the great earl and Archbishop Octavian | Sughi, Mario | Article in Journal | | 1999 |
| The Jacobite duchess : Frances Jennings, duchess of Tyrconnell, c.1649-1731 | Nolan, Frances | Monograph or Collective Volume | Boydell Press | 2021 |
| The John Street Methodist Church | MacCurtain, Sean | Article in Journal | | 2002 |
| The Killeshin church ruins, Queen's County | Fitzgerald, Walter, Lord | Article in Journal | | 1911 |
| The king as judge in early Ireland | Gerriets, Marilyn | Article in Journal | | 1988 |
| The kings of England and papal provisions in fifteenth-century Ireland | Edwards, R. W. D. (Robert Walter Dudley) | Article in Book | | 1961 |
| The Lagan valley : parish values in the early 14th century | Herring, Ivor J. | Article in Journal | | 1936 |
| The landlord, the minister, the tenant and the tithe in Belleek in 1758 | Cunningham, John B. 1944- | Article in Journal | | 1989 |
| The landlords of Mountshannon and surrounding district | Madden, Patrick | Article in Book | | 1993 |
| The lands of the Cross of Holy Trinity, Dublin, in Lechaathel | Connolly, Al | Article in Journal | | 1998 |
| The lands of the Vicars Choral of St Patrick's Cathederal in Harold's Cross, Dublin | Bairéad, Eoin C. | Article in Journal | | 2017 |
| The landscape features, follies and antiquities of Dowth demesne | Fenwick, Joe | Article in Journal | | 2013 |
| The large medieval churches of the dioceses of Leighlin, Ferns, and Ossory : a study of adaptation and change. Pt. 1 | Dolan, Ana | Article in Journal | | 1999 |
| The large medieval churches of the dioceses of Leighlin, Ferns, and Ossory : a study of adaptation and change. Pt. 2 | Dolan, Ana | Article in Journal | | 2000 |
| The last years of Bishop T. A. O'Brien, O.P. | Taheny, L. | Article in Book | | 1951 |
| The late medieval diocese of Clogher, c.1200-1480 | Smith, Brendan, 1963- | Article in Book | | 2005 |
| The late medieval suburban church of Saint Nicholas', Clonmel | Ó Drisceoil, Cóilín | Article in Journal | | 2011 |
| The late-medieval relics of Holy Trinity church, Dublin | Ó Floinn, Raghnall | Article in Book | | 2009 |
| The lay Coarb in medieval times | Barry, J. G. | Article in Journal | | 1959 |
| The layout of Irish early Christian monasteries | Herity, Michael | Article in Book | | 1984 |
| The layout of the temple of Jerusalem as a paradigm for the topography of religious settlement within the early medieval Irish church | Jenkins, David Harold | Thesis | | |
| The legacy of John Bramhall as Laud's alter-ego | Ross, Linda M. | Article in Book | | 1999 |
| The legacy of Newman | Meehan, D. | Article in Journal | | 1946 |
| The legend of St Scothíne : perspectives form early Christian Ireland | Herbert, Máire | Article in Journal | | 2001 |
| The legislation of the synod of Thurles, 1850 | Barry, P. C. | Article in Journal | | 1959 |
| The letters of Oliver Plunkett, 1625-81, archbishop of Armagh and primate of all Ireland | Hanly, JohnPlunkett, Oliver, bishop and saint, 1625-1681 | Monograph or Collective Volume | Dolmen Press | 1979 |
| The letters of Saint Oliver Plunkett, 1625-1681 : Archbishop of Armagh and Primate of all Ireland | | Monograph or Collective Volume | | 1979 |
| The Levitical candle : a comparison of the theology and politics of two leading ecclesiastics, James Ussher (1581-1656) and John Bramhall (1594-1663) | Cunningham, Jack | Thesis | | 2003 |
| The library of the Augustinians of Galway in 1731 | | Article in Journal | | 1990 |
| The life and career of Hugh Brady, bishop of Meath, 1563-84 | Walshe, Helen Mary | Thesis | | 1985 |
| The life and times of Archbishop Denis O'Driscoll (1600-1650) | Coombes, James | Article in Journal | | 1965 |
| The life and times of Bishop Edward Kernan | Mulligan, Patrick | Article in Journal | | 1981 |
| The life and times of Daniel Murray : Archbishop of Dublin, 1823-1852 | Morrissey, Thomas J. | Monograph or Collective Volume | Messenger Publications | 2018 |
| The life of Dr Thomas Hussey (1746-1803), bishop of Waterford and Lismore | Murphy, William Gerald | Thesis | | 1968 |
| The life of the Celtic Church | Bulloch, James | Monograph or Collective Volume | Saint Andrew Press | 1963 |
| The life of Thomas Hussey, 1746-1803, Bishop of Waterford and Lismore | Murphy, Liam | Monograph or Collective Volume | Kingdom Books | 2016 |
| The life, times, and correspondence of the Rt. Rev. Dr. Doyle, Bishop of Kildare and Leighlin | Fitzpatrick, W. J., 1830-1895 | Monograph or Collective Volume | | 1861 |
| The Limerick bishop who said no to papal infallibility | Irwin, Liam | Article in Journal | | 1993 |
| The lion on the hill : a history of St. Mark's Church, Dundela, Belfast, 1878-1998 | Beckett, J. C. (James Camlin) | Monograph or Collective Volume | Minprint [Printer] | 1998 |
| The lives of Kevin (Caoimhghin) of Glendalough | Ó Riain, Pádraig | Article in Book | | 2011 |
| The location of early churches in northern county Clare | Mytum, Harold C. | Article in Book | | 1982 |
| The Logo of Sligo Field Club, Carrowntemple Slabs, the Moylough Belt-shrine and St Mobhí | Timoney, Martin A. | Article in Journal | | 2015 |
| The Louvain achievement I : the Annals of the Four Masters | Cunningham, Bernadette | Article in Book | | 2009 |
| The Louvain achievement II : hagiography | Ó Riain, Pádraig | Article in Book | | 2009 |
| The Maher-Crolly controversy, 1850 | Macaulay, Ambrose | Article in Journal | | 1984 |
| The making of medieval Derry | Devlin, Ciaran J. | Monograph or Collective Volume | Veritas | 2013 |
| The making of the altar | Cussen, Cliodna | Article in Book | | 1998 |
| The maledictory psalms | Wiley, Dan M. | Article in Journal | | 2001 |
| The man in the middle : St Laurence O'Toole, patron saint of Dublin | Forristal, Desmond | Monograph or Collective Volume | Veritas | 1988 |
| The Marian Restoration in Ireland | Jefferies, Henry A. | Article in Journal | | 2016 |
| The mason and his mark : masons' marks in the medieval Irish archbishoprics of Cashel and Dublin | Hourihane, Colum P., 1955- | Monograph or Collective Volume | Archaeopress | 2000 |
| The material and visual culture of the construction of Irish Catholic identity : Saint Colman’s Cathedral, Queenstown, County Cork | Wilson, Ann | Article in Book | Palgrave Macmillan | 2015 |
| The material culture of the canonical movement in medieval Ireland | Moss, Rachel | Article in Book | | 2019 |
| The Maynooth College archive | Corish, Patrick J. | Article in Journal | | 1995 |
| The McMahon Chalice 1724 | Magee, Philip
| Article in Journal | | 2013 |
| The medieval bishops of Elphin and the lost church at Kilteasheen | Finan, Thomas | Article in Book | | 2013 |
| The medieval borough of Louth : an archaeological study | Bradley, John, 1954-2014 | Article in Journal | | 1987 |
| The medieval chapter of Armagh Cathedral | Watt, J. A. | Article in Book | | 1992 |
| The medieval church at Ballyroe, Co. Cork | Cotter, Eamonn | Article in Journal | | 2002 |
| The medieval church lands of County Dublin | Otway-Ruthven, Annette Jocelyn, 1909-1989 | Article in Book | | 1961 |
| The medieval churches and Old Leighlin cathedral in County Carlow | O'Neill, Michael | Article in Book | | 2008 |
| The medieval churches of County Offaly | FitzPatrick, ElizabethO'Brien, Caimin | Monograph or Collective Volume | Government of Ireland | 1998 |
| The medieval churches of Kilkeeran Co. Mayo | McDermott, Yvonne | Article in Journal | | 2018 |
| The medieval city of Limerick | Hodkinson, Brian | Article in Book | | 2009 |
| The medieval diocese of Meath | Brady, John, d.1963 | Article in Journal | | 1957 |
| The medieval fabric of the cathedral church of St Patrick in Dublin | Rae, E. C. | Article in Journal | | 1980 |
| The medieval font from Kilballyowen, Co. Clare | Higgins, Jim | Article in Journal | | 1995 |
| The medieval Irish Church and early Norse Christianity | Martin, Thomas | Thesis | | 2008 |
| The medieval manuscripts of Christ Church Cathedral, Dublin | | Monograph or Collective Volume | Four Courts | 2006 |
| The medieval parish church of Glynn, county Antrim | Gault, Andrew | Article in Journal | | 2018 |
| The medieval parish churches in county Meath | O'Neill, Michael | Article in Journal | | 2002 |
| The medieval parish churches of county Kildare | O'Neill, Michael | Article in Journal | | 2004 |
| The medieval parish churches of County Kildare | O'Neill, Michael | Article in Book | | 2006 |
| The medieval parish churches of south-west county Dublin | Ní Mharcaigh, Máirín | Article in Journal | | 1997 |
| The Medieval Parish of Kilmeane, in the Historical and Archaeological record | Curley, Daniel Patrick | Article in Book | | 2023 |
| The medieval period | Cosgrove, Art | Article in Book | | 1991 |
| The medieval rural dean and rural deanery in Ireland | MacCotter, Paul | Article in Book | | 2015 |
| The medieval settlement | Macdonald, Philip | Article in Book | | 2012 |
| The medieval Tower of Hook : a review of its dating and history | Murtagh, Ben | Article in Book | | 2016 |
| The Mediterranean legacy in early Celtic Christianity : a journey from Armenia to Ireland | Ghazarian, Jacob G. | Monograph or Collective Volume | Bennett & Bloom | 2006 |
| The men of the north | Shaw, R. C. | Monograph or Collective Volume | | 1973 |
| The menagerie of the Derrynaflan paten | Ryan, Michael | Article in Journal | | 1995 |
| The menagerie of the Derrynaflan paten | Ryan, Michael | Article in Book | | 1997 |
| The Methodist chapels in Dublin | Cooney, Dudley A. Levistone | Article in Journal | | 2004 |
| The metrical prose of Adomnán's Vita Columbae : an unusual system | Picard, Jean-Michel | Article in Book | | 1984 |
| The Middle Church of Ballinderry and Bishop Jeremy Taylor | Bigger, Francis Joseph, 1863-1926Fennell, William J. | Monograph or Collective Volume | Marcus Ward | c. 1910 |
| The ministry of the Church of Ireland, 1536-1636 | Diamond, CiaranLennon, Colm, | Article in Book | | 2006 |
| The misericords in St Mary's cathedral, Limerick : an additional note | Cherry, John | Article in Book | | 2011 |
| The modern traveller to the early Irish Church | Hamlin, AnnHughes, Kathleen Winifred | Monograph or Collective Volume | SPCK | 1977 |
| The modest men of Christ Church, Cork | McKenna, T. J.Moore, Charles | Monograph or Collective Volume | Leinster Leader, printer | 1970 |
| The monasteries of Ireland : an introduction | Mould, D. D. C. P. | Monograph or Collective Volume | Batsford | 1976 |
| The monastery of Linn Duachaill | Clinton, Mark | Article in Journal | | 2013 |
| The monastery of Saint Mochaoi of Nendrum | Lawlor, H. C. (Henry Cairnes), 1870-1943 | Monograph or Collective Volume | The Belfast Natural History and Philosophical society | 1925 |
| The monastic hierarchy in twelth century Ireland : the case of Kells | Nic Aongusa, Bairbie | Article in Journal | | 1990 |
| The monastic settlement on Rathlin O Birne island, county Donegal | Walsh, P. | Article in Journal | | 1984 |
| The Monasticon Hibernicum Project : the diocese of Dublin | Mac Shamhráin, Ailbhe | Article in Book | | 2005 |
| The monuments of St Mary's Cathedral, Limerick | Talbot, M. J., Rev. | Monograph or Collective Volume | Treaty Press | 1976 |
| The mosaics of St Anne's Cathedral, Belfast | Mann, John | Article in Book | | 2013 |
| The Muiredach cross at Monasterboice | Morris, Henry | Article in Journal | | 1934 |
| The Munster College petitions in 1838 | Gwynn, D. R. (Denis Rolleston), 1893-1972 | Article in Journal | | 1947 |
| The name of the diocese | McKenna, John | Article in Journal | | 1991 |
| The names of the baronies and parishes in County Kildare | Hamilton, Gustavus Everard | Article in Journal | | 1917 |
| The names of the baronies and parishes in County Kildare | Hamilton, Gustavus Everard | Article in Journal | | 1921 |
| The National Cathedral of St. Patrick, Dublin: discrimination of its ancient architecture and various reparations and discoveries, 1900. The new organ and its place : a report to the Dean and Cathedral Board | Drew, Thomas | Monograph or Collective Volume | Church of Ireland Printing and Publishing Co. | 1900 |
| The national synod of Thurles (1850) | Barry, P. C. | Article in Journal | | 1956 |
| The native reform of the Irish church in the twelfth century | Santry, Jachanthia Patricia | Thesis | | 1987 |
| The nature and character of the early Irish liturgy | Hen, Yitzhak | Article in Book | | 2010 |
| The nature of pre-'Reform' Irish monasticism | Bhreathnach, Edel | Article in Book | | 2019 |
| The Nazareth house, Fahan, Buncrana | Donnelly, Philip | Article in Journal | | 2010 |
| The new St Malachy's : building and finance | Ó Muirí, Réamonn | Article in Book | | 2013 |
| The Nihell chalice 1713 A.D. | Ua Cróinin, Risteárd | Article in Journal | | 1998 |
| The Normans and their world | Lindsay, Jack | Monograph or Collective Volume | | 1973 |
| The northern boundary of the archdiocese of Armagh | Ó Ceallaigh, Séamus | Article in Journal | | 1954 |
| The northern dioceses and the Irish College of Alcalá, Spain | O Connell, Patricia | Article in Journal | | 1993 |
| The notes of the Book of Armagh: a ninth-century witness to North Munster affairs? | Ó Riain, Pádraig | Article in Journal | | 2014 |
| The Nugent family and the diocese of Kilmore in the sixteenth and early seventeenth centuries | Lennon, Colm | Article in Journal | | 2001 |
| The O Dugenan Crucifixion Plaque of 1671 at Fenagh, Co. Leitrim | Timoney, Martin A. | Article in Journal | | 2018 |
| The O'Briens and MacMahons of Thomond, their patronage of the Franciscan Order, and their burial monuments | Ó Dálaigh, Brian | Article in Journal | | 2017 |
| The O'Dea mitre and crozier | Harpur, Anthony | Article in Book | | 2012 |
| The O'Neylons of Dysert and Austria | McInerney, Luke | Article in Journal | | 2018 |
| The obituary of Cathal óg Mac Maghnusa (1498) | Ó Dufaigh, Seosamh | Article in Journal | | 1998 |
| The obligation of Titus: a theological opinion concerning worthiness for episcopal office in the diocese of Ferns, 1645 | McHugh, Jason | Article in Journal | | 2017 |
| The office and function of coarb and erenagh in the Irish church | Barry, John | Thesis | | 1952 |
| The officials of the church of Armagh in the early and central middle ages, to A.D. 1200 | Pettiau, Hérold | Article in Book | | 2001 |
| The old chapel in the late 1920s and early 1930s | Ó hÁdhmaill, Pádraig | Article in Book | | 2013 |
| The old church at Ballynascreen 1854 and other local writings attributable to Rev. Robert King, curate of Sixtowns, County Londonderry | Dunlop, EullKing, Robert | Monograph or Collective Volume | Moyola Books | 1988 |
| The old church silver of Clonfert diocese | Gibson, G. F.Jackson, R. Wyse, | Article in Journal | | 1941 |
| The old churches of Clontead parish | MacCarthy, Seán | Article in Journal | | 1986 |
| The Old Portal and Cathedral of Kilmore | Moss, Rachel | Article in Journal | | 2011 |
| The oldest manuscript witness of the Collectio canonum hibernensis | Meens, Rob | Article in Journal | | 2000 |
| The oldest register of the Parish of Derriaghy, County Antrim, Northern Ireland 1696-1772 | | Monograph or Collective Volume | W. N. C. Barr | 1981 |
| The Oratory Dún Laoghaire | Pilkington, Elizabeth | Article in Journal | | 2020 |
| The Order of Deacons in early Irish canonical sources : a contribution to understanding the evolution of a 'Major Orders' in the western church | O'Loughlin, Thomas | Article in Journal | | 2017 |
| The Order of Deacons in early Irish canonical sources : a contribution to understanding the evolution of a ‘Major Orders’ in the Western church | O’Loughlin, Thomas | Article in Journal | | 2017 |
| The organ in the British Isles until 1600 | Caldwell, John | Article in Journal | | 1971 |
| The organization and function of an early Irish church settlement : what was Glendalough? | Etchingham, Colmán | Article in Book | | 2011 |
| The organization of the Irish church, 1603-1641 | Corish, Patrick J. | Article in Journal | | 1957 |
| The organs and organists of Armagh cathedral | Holmes, John | Article in Journal | | 1989 |
| The organs and organists of Saint Columba's Church, Omagh : a history : Church of Ireland, Parish of Drumragh | Allen, R. H. | Monograph or Collective Volume | R.H. Allen | 2004 |
| The organs and organists of the Cathedral church of Saint Patrick, Armagh, 1482-1998 | McCartney, Alistair G. | Monograph or Collective Volume | Friends of the Cathedral, St Patrick's Church of Ireland | 1999 |
| The origin of medieval parishes in Gaelic Ireland : the evidence from Kilfenora | Ni Ghabhlain, Sinead | Article in Journal | | 1996 |
| The original statuary | Duffy, Joseph | Article in Book | | 1998 |
| The origins of St Mary's Church, Ballygar,its history, and importance to Ballygar, Elphin diocese and Ireland. {1832-1863} | MacNamara, Jarlath | Article in Journal | | 2019 |
| The Origins of the Medieval Parish Revisited | Empey, C. A. (Adrian) | Article in Book | | 2006 |
| The paleography of the 11 Latin citations in TCD MS 1337, pp. 329c–330b | Eska, Charlene M. | Article in Journal | | 2019 |
| The papacy and episcopal appointments in Ireland, 1305-34 | Williams, Patrick | Thesis | | 1961 |
| The papers of Lord Robert Loftus | Ainsworth, John F. | Article in Journal | | 1960 |
| The papers of Nicholas Archdeacon (bishop of Kilmacduagh and Kilfenora 1800-1823) | Murphy, P. J. | Article in Journal | | 1973 |
| The parish and the Ulster Plantation | Gillespie, Raymond | Article in Journal | | 2008 |
| The parish church of St Mary, Oughterard : the background to its construction, with an account of the dispute concerning title to its site | Mitchell, James | Article in Journal | | 2002 |
| The parish church of St. Colmanell, Ahoghill | Lee, W. H. A., Rev. | Monograph or Collective Volume | Newton Publishing Co. (printer) | c. 1911 |
| The parish churches of North Tipperary : commemorating a two-hundred year heritage | Hayes, William J.Kennedy, Joseph | Monograph or Collective Volume | Lisheen Publications | 2007 |
| The parish clergy of the Church of Ireland in the eighteenth century | Legg, Marie-Louise | Article in Book | | 2006 |
| The parish in medieval and early modern Ireland | | Monograph or Collective Volume | Four Courts Press for the Group for the Study of Irish Historic Settlement | 2006 |
| The Parish of Ardboe and its church history - from a lecture in 1872 | Twigg, Thomas, Jr | Article in Journal | | 2013 |
| The parish of Clontuskert : glimpses into its past | | Monograph or Collective Volume | Clontuskert Heritage Group | 2009 |
| The parish of Cloughbawn | Harte, Laurence | Article in Journal | | 1925 |
| The parish of Craigs in the County of Antrim | Boyd, Hugh Alexander | Monograph or Collective Volume | Observer Office [printer] | 1950 |
| The parish of Devenish and Boho | Elliott, E. G. | Monograph or Collective Volume | Oakdene | 1990 |
| The parish of Devenish, County Fermanagh : materials for its history | Steele, William B. | Monograph or Collective Volume | Fermanagh Times (printer) | 1937 |
| The Parish of Dungiven : memoirs of bygone days | Kelly, James, Rev. | Monograph or Collective Volume | Londonderry Sentinel (Printer) | 1935 |
| The Parish of Edenderry : Diocese of Derry | Law, Herbert Innes | Monograph or Collective Volume | Tyrone Constitution | 1949 |
| The parish of Inchicronan (Crusheen) | Coffey, Thomas | Monograph or Collective Volume | Ballinakella | 1993 |
| The parish of Iniscealtra | Madden, Gerard | Article in Book | | 1993 |
| The Parish of Inishmacsaint | Parke, William K. | Monograph or Collective Volume | Select Vestry, Parish of Inishmacsaint | 1982 |
| The parish of Kilfaughnabeg | Webster, Charles A. | Article in Journal | | 1929 |
| The parish of Kilfearagh, Co. Clare, 1835-50 | Murphy, Ignatius, Rev. | Thesis | | 1969 |
| The parish of Kilmeen (Boherbue-Kilkeam) | McCarthy, Louis | Article in Journal | | 1997 |
| The parish of Lambeg | Marshall, H. C., Rev. | Monograph or Collective Volume | Victor McMurray | 1933 |
| The Parish of St. John's Kilcluney: a bi-centenary history 1794-1994 | McCune, Jack | Monograph or Collective Volume | Trimprint [printer] | 1994 |
| The Parish of Termonmaguirke: a bi-centenary history 1792-1992 | Armstrong, Maurice A. | Monograph or Collective Volume | Graham & Sons Ltd. | 1991 |
| The parishes in the diocese of Killala : Tireragh, Erris, south Tirawley, north Tirawley | McHale, Edward | Monograph or Collective Volume | The author | 1985 |
| The parishes of Leckpatrick and Dunnalong : their place in history | Roulston, William J. | Monograph or Collective Volume | Ulster Local History Trust | 2000 |
| The paruchia of St. Finbarr | O'Connor, Timothy P. | Thesis | | 1977 |
| The pastoral mission in the early Irish church | Corish, Patrick J. | Article in Book | | 1971 |
| The pastoral vision of Paul Cullen | O'Carroll, Ciaran | Article in Book | | 2011 |
| The Patronage of the Church and its Purposes | Luxford, Julian M. | Article in Book | | 2008 |
| The pattern day | MacMahon, Bryan | Article in Book | | 2012 |
| The penal laws in North Kerry, 1677-1685 | Howard, Leonard | Article in Journal | | 1971 |
| The people's primate : a memoir of Joseph Cardinal MacRory | Murphy, J. J. | Monograph or Collective Volume | Priory P. | 1946 |
| The pictorial history of the cathedral church of the Holy Trinity : Christ Church cathedral, Dublin | Crawford, M. V. | Monograph or Collective Volume | | 1967 |
| The Pipe Organs of Donegal | Fleming, Derek | Article in Journal | | 2020 |
| The Pipe Roll of Cloyne (Rotulus pipae Clonensis) | | Monograph or Collective Volume | Cloyne Literary and Historical Society | 1996 |
| The place of seven wonders | Grenville-Nugent, Mrs. | Article in Journal | | 1948 |
| The place of the archdiocese of Dublin in the hagiographical tradition of the continent | Hennig, John | Article in Journal | | 1955 |
| The plain style : the reformation, culture and the crisis in protestant identity | Brett, David | Monograph or Collective Volume | Black Square Books | 1999 |
| The plate of Trinity College in the time of Provost Baldwin | Alton, E. H. | Article in Journal | | 1950 |
| The plenary synod of Thurles | Ahern, John | Article in Journal | | 1951 |
| The plundered tates : Cahill Duff O Connally and the bishop's land in Clones parish | Schlegel, Donald M. | Article in Journal | | 1991 |
| The political and ecclesiastical extent of Scottish Dalriada | O'Neill, Pamela | Article in Journal | | 2005 |
| The political and religious thought of Florence Conry and Hugh McCaughwell | Mac Craith, Mícheál | Article in Book | | 2005 |
| The politics of Cardinal McCabe, archbishop of Dublin, 1879-85 | Woods, C. J. (Christopher John) | Article in Journal | | 1973 |
| The Poor Clare order in Ireland | Cunningham, Bernadette | Article in Book | | 2009 |
| The pope, a knight and a bishop on the edge of Christendom : the politics of exclusion in thirteenth-century Ireland | Marshall, John | Article in Journal | | 2023 |
| The pope, the prelate, the soldiers and the controversy : Paul Cullen and the Irish Papal Brigade | O'Connor, Anne | Article in Book | | 2011 |
| The popes and the ecclesiastical history of medieval Ireland : critical texts of the papal bulls, 1070-1254, with historical annotations | Sheehy, Maurice P., Rev. | Thesis | | 1960 |
| The post-Reformation bishops of Kerry | O'Ryan, J. C. | Article in Journal | | 1997 |
| The practicalities of communication between Northumbrian and Irish churches, c. 635-735 | Edmonds, Fiona | Article in Journal | | 2009 |
| The practicalities of communication between Northumbrian and Irish churches, c.635-735 | Edmonds, Fiona | Article in Book | | 2009 |
| The Presbyterian church in Mallow | Rutherford, Colman | Article in Journal | | 2013 |
| The presbyterian synod and catholic emancipation, 1825-9 | Gallagher, J.R. | Thesis | | 1970 |
| The Presbyterians of Ulster 1680-1730 | Whan, Robert | Monograph or Collective Volume | Boydell | 2013 |
| The priest and politics in County Tipperary, 1850-1891 | O'Shea, James P. | Thesis | | 1979 |
| The priests and people of Killaloe diocese - after Cromwell : a review article | Ó Murchadha, Ciarán | Article in Journal | | 1996 |
| The priests of the diocese of Limerick, 1878-1917 | Tobin, Matthew | Thesis | | 2006 |
| The primacy in the Irish Church | Ó Fiaich, Tomás | Article in Journal | | 2006 |
| The Primacy of Ireland : resident in the see of Armagh for fourteen centuries | Reeves, William | Monograph or Collective Volume | Dublin University Press [printer] | 1886 |
| The primates and the church lands of Armagh | Glancy, Michael | Article in Journal | | 1970 |
| The primatial controversy (1670-1728) : a bibliographical note | Wall, Thomas | Article in Journal | | 1939 |
| The priory and parish of Killeigh | Comerford, M., P.P. | Article in Journal | | 1883 |
| The priory of Llanthony Prima and Secunda in Ireland, 1172-1541 : lands, patronage and politics | Hogan, Arlene | Monograph or Collective Volume | Four Courts | 2008 |
| The Pro-Cathedral altar frontal | Kane, Eileen | Article in Book | | 2012 |
| The proctor's accounts of Peter Lewis, 1564-1565 | | Monograph or Collective Volume | Four Courts | 1996 |
| The proctors' accounts of the parish church of St Werburgh, Dublin, 1481-1627 | | Monograph or Collective Volume | Four Courts Press in association with the Representative Church Body Library | 2009 |
| The progeny of St. Martin-in-the-Fields | Whiffen, Marcus | Article in Journal | | 1946 |
| The Prosperous crozier and its inscription | Murray, GriffinÓ Riain, Pádraig | Article in Journal | | 2017 |
| The Prosperous, Co. Kildare, Crozier: archaeology and use. | Bourke, CormacHook, Duncan | Article in Journal | | 2017 |
| The Protestant reformation in Ireland, c.1590-1641 | Ford, Alan, 1956- | Thesis | | |
| The province and diocese of Armagh, 1417-71 | Lynch, Anthony | Article in Journal | | 1982 |
| The province and diocese of Armagh, 1417-71 | Lynch, Anthony | Thesis | | 1979 |
| The provision of Anglican places of worship in the parishes of Inishowen,1622-1733 | Roulston, William | Article in Journal | | 2018 |
| The provision, building and architecture of Anglican churches in the north of Ireland, 1600-1740 | Roulston, William J. | Thesis | | |
| The psalter of Cashel : a provisional list of contents | Ó Riain, Pádraig | Article in Journal | | 1989 |
| The public career of Rev Thomas Maguire, 1792-1847 | Ó Duigneáin, Proinnsíos | Article in Book | | 2019 |
| The purchase of Archbishop's Ussher's library in 1657 | Barnard, T. C. (Toby Christopher) | Article in Journal | | 1971 |
| The purpose of Adomnán's Vita Columbae | Picard, Jean-Michel | Article in Journal | | 1982 |
| The purpose of Cardinal Ó Fiaich | Faul, Denis | Article in Journal | | 1991 |
| The Quaker meeting houses of Ireland : an account of some 150 meeting houses and 100 burial grounds in Ireland | Butler, David M. | Monograph or Collective Volume | Irish Friends Historical Committee | 2004 |
| The quarrel among the Roman Catholic hierarchy over the national system of education in Ireland, 1838-41 | Larkin, Emmet | Article in Book | | 1964 |
| The question of religious conformity and nonconformity in the Irish refuge | Pittion, Jean-Paul | Article in Book | | 1987 |
| The radical face of Paul Cardinal Cullen | Corish, Patrick J. | Article in Book | | 1985 |
| The reconstruction of the Church of Ireland : Bishop Bramhall and the Laudian reforms, 1633-1641 | McCafferty, John | Monograph or Collective Volume | Cambridge University Press | 2007 |
| The rectors of Clonleigh since the Reformation | Edwards, William Macklin | Monograph or Collective Volume | [Clonleigh Parish] | 1884 |
| The rectors of Killinchy and Kilmood, Diocese of Down | Swanzy, Henry B. | Monograph or Collective Volume | R. Carswell & Son [Printer] | 1932 |
| The rectory ghost - Mr George West Pyper | Anonymous | Article in Journal | | 2017 |
| The Reformation and the transformation of urban space in Irish towns (based on the Irish Historic Towns Atlas) | Simms, Anngret | Article in Book | | 2013 |
| The reformation bishops of the diocese of Waterford and Lismore | Cowman, Des | Article in Journal | | 1984 |
| The Reformation charter of Christ Church Cathedral, Dublin, 1541 | Diamond, Ciaran | Article in Journal | | 1999 |
| The Reformation in the age of Jefferson | Ingram, Robert G. | Article in Book | | 2021 |
| The register of Milo Sweteman, Archbishop of Armagh, 1361-1380 | | Monograph or Collective Volume | Irish Manuscripts Commission | 1996 |
| The register of Nicholas Fleming : Archbishop of Armagh, 1404-1416 | | Monograph or Collective Volume | Irish Manuscripts Commission | 2003 |
| The register of St Saviour's Chantry of Waterford. Registrum Cantariae S. Salvatoris Waterfordensis. BL, Harleian MS 3765 | | Monograph or Collective Volume | Irish Manuscripts Commission | 2013 |
| The register of the diocese of Clogher | Flanagan, Patrick J. | Article in Journal | | 1953 |
| The register of the Liberties of Cashel, 1654-1657 | | Article in Journal | Parish Register Society of Dublin | 1907 |
| The register of the parish of Leixlip, Co. Kildare, 1665 - 1778 | | Monograph or Collective Volume | Representative Church Body Library | 2001 |
| The register of the parish of the Holy Trinity (Christ Church), Cork, from July 1643 to February 1668, with extracts from the parish books from 1664 to 1668 | Caulfield, Richard | Monograph or Collective Volume | Purcell & Co. | 1877 |
| The register of the reformed church at Le Mans, 1650-1685 | | Monograph or Collective Volume | Publications of the Huguenot Society of London | 1961 |
| The registers of Christ Church Cathedral, Dublin | | Monograph or Collective Volume | Irish Academic Press | 1998 |
| The regular clergy and the episcopate in Ireland, 1600-1650 | Ó hAnnracháin, Tadhg | Article in Book | | 2022 |
| The relations between Church and State in the age of emancipation | Nowlan, Kevin B. | Article in Journal | | 1961 |
| The relations of the Catholic Church and the state in England and Ireland, 1800-52 | Roche, K. F. | Article in Book | | 1961 |
| The religious condition of Ireland, 1770-1850 | Yates, Nigel | Monograph or Collective Volume | Oxford University Press | 2006 |
| The religious dimension in Gladstone's Home Rule analysis | McCarthy, John-Paul | Article in Book | | 2011 |
| The religious life | Dalton, MichaelO’Brien, Rory | Article in Book | | 2015 |
| The remains at Temple-na-Skellig, Glendalough | Long, Harry | Article in Journal | | 1997 |
| The repair of Dromacoo Old Church | Hamilton, T. | Article in Journal | | 1903 |
| The Reportorium Viride of John Alen, archbishop of Dublin, 1533 | White, Newport B. | Article in Journal | | 1941 |
| The representation of Gregory the Great in Irish sources of the pre-Viking era | Herbert, Máire | Article in Book | | 2011 |
| The Representative Church Body library and the creation of a Church of Ireland Archive | Refaussé, Raymond | Article in Journal | | 2014 |
| The Representative Church Body Library and the records of the Church of Ireland | Refaussé, Raymond | Article in Journal | | 1995 |
| The Representative Church Body Library, Dublin | Refaussé, Raymond | Article in Journal | | 1992 |
| The restoration of Creggan churchyard | Murphy, Jem | Article in Journal | | 1992 |
| The restoration of Rathmoyle Ancient Cemetery | Anonymous | Article in Journal | | 1998 |
| The restoration of St. Mary's Cathedral 1863-'78 | Claffey, John A. | Article in Book | | 1997 |
| The Retraction of Peter Walsh, OFM, 1688 | Fennessy, Ignatius | Article in Journal | | 1992 |
| The Reverend John Abernethy : the challenge of New Light theology to traditional Irish Presbyterian Calvinism | Holmes, Finlay | Article in Book | | 1996 |
| The right of patronage of the Maguires of Tempo | Faulkner, Anselm | Article in Journal | | 1977 |
| The rite of church dedication in early medieval Ireland and the dedication scheme in the Angers manuscript 477 | Barbet-Massin, Dominique | Article in Journal | | 2016 |
| The role of St Anthony's College, Louvain in establishing the Irish Franciscan college network, 1607-60 | Lyons, Mary Ann | Article in Book | | 2009 |
| The role of the church in early Irish regnal succession : the case of Iona | Warntjes, Immo | Article in Book | | 2010 |
| The Role of the Churches in the conflict in Northern Ireland | Hickey, John | Article in Journal | | 1985 |
| The role of the parish in building and maintaining Anglican churches in the north of Ireland 1660-1740 | Roulston, William J. | Article in Book | | 2006 |
| The Roman Catholic Church and the Irish Civil War | Murray, Patrick | Article in Journal | | 2015 |
| The Roman Catholic church in Ireland : 1898-1918 | Miller, David William, 1940- | Article in Journal | | 1968 |
| The Roman Catholic clergy and politics during the episcopacy of John Cantwell, 1830-1866 | Connell, Paul | Article in Book | | 2015 |
| The Roman Catholic parish registers of Wexford town from c.1672 : some considerations of their significance and use in historical research | Rafferty, Celestine | Article in Journal | | 1994 |
| The Romanesque arch at Wicklow church | Johnson, David M. | Article in Journal | | 1973 |
| The Romanesque doorway at Clonfert | Crawford, H. S. | Article in Journal | | 1912 |
| The Romanesque frescoes in Cormac's Chapel, Cashel | Perry, Mark | Article in Journal | | 1995 |
| The romanesque passion lintel at Raphoe, Co. Donegal | Harbison, Peter | Article in Book | | 1992 |
| The Romanesque portal at Clonfert Cathedral and its iconography | O'Keeffe, Tadhg | Article in Book | | 1995 |
| The Romanesque portal at Clonfert cathedral and its iconography | O'Keeffe, Tadhg | Article in Book | | 1995 |
| The Romanesque sculpture of Tuam | Stalley, Roger | Article in Book | | 1981 |
| The romanesque sculptures of Ardmore Cathedral, Co. Waterford | McNab, S. L. | Article in Journal | | 1988 |
| The round tower of Down | Rankin, J. Frederick | Article in Journal | | 1997 |
| The Round Towers of Fingal : Their hidden history | Ronan, Gerard | Monograph or Collective Volume | Fingal County Council | 2019 |
| The round towers of Ireland | Barrow, Viola | Article in Journal | | 1991 |
| The round towers of the County Kildare : their origin and use | Fitzgerald, Walter, Lord | Article in Journal | | 1895 |
| The rule of St. Patrick | | Article in Journal | | 1904 |
| The Scots in early Stuart Ireland : Union and separation in two kingdoms | | Monograph or Collective Volume | Manchester UP | 2016 |
| The sculpture of the cloister of Jerpoint abbey | Rae, E. C. | Article in Journal | | 1966 |
| The sculptured crosses of Galloon | Lowry-Corry, Dorothy | Article in Journal | | 1934 |
| The second burial of Bishop Shanahan | Forristal, Desmond | Monograph or Collective Volume | Veritas | 1990 |
| The secular clergy of the archdiocese of Armagh, 1518-58 | Jefferies, Henry Allen | Thesis | | 1996 |
| The secular Franciscans | Conlan, Patrick, 1940- | Article in Book | | 2009 |
| The secular priests of the diocese of Ferns : lists of priests who served in each parish, with short biographical notes | Gahan, John | Monograph or Collective Volume | Editions de Signe | 2000 |
| The See lands of Kildare | Devitt, Matthew | Article in Journal | | 1921 |
| The see of Tuam in Rath Breasail Synod | Connellan, M. J. | Article in Journal | | 1950 |
| The see-lands of the diocese of Ardfert : an essay in reconstruction | MacCotter, Paul | Article in Journal | | 2000 |
| The Semples and St. Selskar's | Murphy, Elaine | Article in Journal | | 2005 |
| The sermon-diary of Richard FitzRalph, archbishop of Armagh | Gwynn, Aubrey | Article in Journal | | 1937 |
| The silent century, 1698-1829 | MacMahon, Joseph | Article in Book | | 2009 |
| The site of the bishop's court, Mullynure, Co. Armagh | Lynn, C. J. | Article in Journal | | 1976 |
| The small late medieval church of Kilbarron, County Donegal | Brennan, Bridget | Article in Journal | | 2015 |
| The Snetzler organ in St. Peter's Parish Church, Drogheda | Henly, Randal Lewis | Monograph or Collective Volume | St. Peter's Parish Church | 2002 |
| The so-called Cloch Oir at Clogher Cathedral | Lawlor, H.C. | Article in Journal | | 1931 |
| The Society of the Sacred Heart ... 1875 | Finlay, John | Article in Journal | | 2020 |
| The sources for the early history of Ireland, 1 : Ecclesiastical. An introduction and guide | Kenney, J. F. (James Francis) | Monograph or Collective Volume | Columbia UP | 1929 |
| The sources for the early history of Ireland, ecclesiastical | Kenney, J. F. (James Francis) | Monograph or Collective Volume | Irish University Press | 1968 |
| The sources for the early history of Ireland, ecclesiastical | Kenney, J. F. (James Francis) | Monograph or Collective Volume | Four Courts | 1993 |
| The spirituality of the Céili Dé | Ó Fiannachta, Pádraig | Article in Book | | 1981 |
| The stained and leaded glass of Skerries [Talk given 2007] | Bashford-Synnott, Marie | Article in Journal | | 2010 |
| The stained glass | | Article in Book | | 1998 |
| The stained glass windows of St Ailbe's Church, Emly | O'Dwyer, Michael | Monograph or Collective Volume | Emly Parish Council | 2015 |
| The stained glass windows of St. Ailbe's Church, Emly | O'Dwyer, Michael | Monograph or Collective Volume | Emly Parish Council | 2015 |
| The state of religion in the province of Leinster during the 17th century, illustrated by extracts from synodical decrees | Comerford, M., P.P. | Article in Journal | | 1879 |
| The state of the church in the diocese of Down and Connor during the episcopate of Robert Echlin 1613-35 | Millsopp, Sandra A. | Article in Journal | | 1982 |
| The state of the church in the diocese of Down and Connor during the episcopate of Robert Echlin, 1613-1635 | Millsopp, Sandra Ann | Thesis | | 1979 |
| The statue : Cork's monument to Father Mathew, Apostle of Temperance | O'Callaghan, Antóin | Monograph or Collective Volume | Cork City Library | 2014 |
| The status of Coarb and Erenach | Barry, J. G. | Article in Journal | | 1960 |
| The status of coarbs and erenaghs | Barry, J. G. | Article in Journal | | 1960 |
| The status of Munster churches | Flahive, Joseph J. | Article in Book | | 2015 |
| The steeple, bells and clocks of Shankill parish | Irwin, John | Monograph or Collective Volume | Lurgan Society of Changeringers | 1959 |
| The stone-roofed church at Ardrass | "Omurethi" | Article in Journal | | 1911 |
| The stories buildings tell : engaging with architecture in Donegal | Boal, Marianne | Article in Journal | | 2012 |
| The story behind the stained glass window panel of the Madonna and Child in Foxroxk Church, created by the Harry Clarke Studios | Clare, Liam | Monograph or Collective Volume | Foxrock Local History Club | 2018 |
| The Story of a parish ... written to celebrate the centenary year of the Parish Church of Saint Stephen, Millfield (originally known as Saint Stephen's Free Church) | Rodgers, Terence, Rev. | Monograph or Collective Volume | [St Stephen's Parish] | 1969 |
| The story of Ardglass | Napier, James McCabe | Monograph or Collective Volume | [St Nicholas' parish, Ardglass] | 1966 |
| The Story of Clonmacnois | Giff, William Lee Martin, Rev. | Monograph or Collective Volume | Athlone Printing Works [printer] | 1954 |
| The story of Foxrock Church (1935-2010) | Clare, Liam | Monograph or Collective Volume | Foxrock Local History Club | 2010 |
| The story of Holy Trinity Church, Belfast, 1843 - 1941 - 1956 | Reid, S. H. | Monograph or Collective Volume | Howard Publications | 1956 |
| The story of St. Nicholas' : Collegiate Church, Galway | Berry, J. Fleetwood | Monograph or Collective Volume | O'Gorman | 1912 |
| The Story of St. Patrick's Cathedral, Trim | Giff, W. L. M. | Monograph or Collective Volume | | 1959 |
| The Story of the Parish Church of Saint Mary, Belfast : written to celebrate the centenary of the consecration in November 1968 | Byers, Robert | Monograph or Collective Volume | [St Mary's Parish] | 1968 |
| The story of the united parishes of Glenavy, Camlin and Tullyrusk together with short accounts of the history of the different denominations in the Union | Watson, Charles | Monograph or Collective Volume | M'Caw, Stevenson & Orr [Printers] | 1892 |
| The Story of Trory | McNutt, J. A. M. | Monograph or Collective Volume | Graham & Sons | 1978 |
| The Stowe missal | Ó Riain, Pádraig | Article in Book | | 2009 |
| The Stowe Missal : its provenance and recent history | Fitzpatrick, Siobhán | Article in Book | | 2007 |
| The strange case of Bishop John Atherton | Winnett, Robert | Article in Journal | | 1988 |
| The strange case of the drunken bishop : a reformation mystery solved | Daniel, T. K. | Article in Journal | | 1980 |
| The structure and purpose of Adomnán's Vitae Columbae | Charles-Edwards, T. M. (Thomas Mowbray) | Article in Book | | 2010 |
| The study and use of numbers in early Irish monasteries | Mc Carthy, Daniel P., 1945- | Article in Book | | 2011 |
| The study of early church architecture in Ireland : an Anglo-Saxon viewpoint, with an appendix on documentary evidence for round towers | Hamlin, AnnHare, Michael | Article in Book | | 1986 |
| The study of early Irish churches | Hamlin, Ann | Article in Book | | 1984 |
| The styles of Irish church architecture in the nineteenth century | Larmour, Paul | Article in Book | | 2000 |
| The suppression of the see of Kells | Brady, John, d.1963 | Article in Journal | | 1945 |
| The Swift chalice | Jackson, Victor | Article in Journal | | 1988 |
| The synod of Cashel, 1101 : conservative or innovative? | Ó Corráin, Donnchadh | Article in Book | | 2004 |
| The synod of Dublin in 1080 | Holland, Martin | Article in Book | | 2002 |
| The synod of Kells in MS BL, Add. 4783 | Holland, Martin | Article in Journal | | 2005 |
| The Synod of Kells, 1152 | Battersby, William | Monograph or Collective Volume | William Battersby | 2002 |
| The synod of Thurles, 1850 : discipline and education | Doherty, Gillian M.,O'Riordan, Tomás | Article in Book | | 2011 |
| The Synod of Thurles, 1850 : documents | MacCarthy, John Paul,O'Riordan, Tomás | Article in Book | | 2011 |
| The synod of Ulster and the national board | Batterberry, R. | Article in Journal | | 1942 |
| The templars, the witch and the wild Irish: vengeance and heresy in Medieval Ireland | Callan, Maeve Brigid | Monograph or Collective Volume | Four Courts Press | 2015 |
| The text of the Latin Bible in the early Irish church : some data and desiderata | McNamara, Martin | Article in Book | | 1987 |
| The theological and philosophical accomplishments of the Irish Franciscans : from Flaithrí Ó Maoil Chonaire to Bonaventure Baron | Stone, Martin W. F. | Article in Book | | 2009 |
| The three orders of Irish saints : new light from early Church studies | de Bhaldraithe, Eoin | Article in Journal | | 2008 |
| The times and life of Nicholas Sweetman, Bishop of Ferns, (1744-86) | Furlong, Nicholas | Article in Journal | | 1983 |
| The Tisrara medieval church Carrowntemple, Four Roads, Co. Roscommon : its archaeology and history | Higgins, Jim | Monograph or Collective Volume | Tisrara Heritage and Graveyard Restoration Committee | 1995 |
| The tithe question, 1830-32 | O'Donoghue, Patrick, Rev. | Thesis | | 1962 |
| The Tithe War in north-east Carlow | Shannon, James P. | Article in Journal | | 2012 |
| The tithes and trials of Reverend Robert Morritt, Castlehaven, Co. Cork | Murphy, Donal | Article in Journal | | 2013 |
| The topographical development of Scandinavian and Anglo-Norman Waterford city | Bradley, John, 1954-2014Halpin, Andrew | Article in Book | | 1992 |
| The town of Passage West and the parish of Marmullane | Webster, Charles A. | Article in Journal | | 1907 |
| The transformation of the Irish church in the twelfth and thirteenth centuries | Flanagan, Marie Therese | Monograph or Collective Volume | Boydell Press | 2010 |
| The transmission of song in national schools in mid nineteenth-century Ireland : social, religious and political values in canon | McCarthy, Marie | Article in Book | | 2007 |
| The transmission of the Hibernensis in Italy : tenth to the twelfth century | Reynolds, Roger E. | Article in Journal | | 2000 |
| The triumph of evangelicalism in the Synod of Ulster in the early nineteenth century | Holmes, Finlay | Article in Book | | 2002 |
| The Tudor diocese of Dublin: episcopal, government, ecclesiastical plticas and the enforcement of the Reformation, 1534-1590 | Murray, James | Thesis | | 1997 |
| The twelfth-century reform | Gwynn, Aubrey | Monograph or Collective Volume | Gill & Macmillan | 1968 |
| The twentieth-century cathedral | MacCarthy, R. B. (Robert B.) | Article in Book | | 2009 |
| The twin churches book, Wexford, 1858-2008 | | Monograph or Collective Volume | Carraig Mór House | 2008 |
| The two cathedral chapters of medieval Dublin and their mutual relations, from the foundation of Holy Trinity (c.1030) to the death of Archbishop Bicknor (1349) | Hand, Geoffrey J. | Thesis | | 1954 |
| The Uí Briain, the De Burgos and the Hiberno-Norman settlement of Limerick | Swift, Catherine | Article in Journal | | 2017 |
| The Uí Muiredaig and the abbacy of Glendalough in the eleventh to thirteenth centuries | Mac Shamhráin, Ailbhe | Article in Journal | | 1993 |
| The ultramontane spirituality of Paul Cullen | Rafferty, Oliver P. | Article in Book | | 2011 |
| The Union of Synods in the context of mid-Antrim : a sesquicentenary account of the formation in 1840 of the General Assembly of the Presbyterian Church in Ireland, illustrated with documents of local religious history | Dunlop, EullHolmes, Finlay | Monograph or Collective Volume | Mid-Antrim Historical Group | 1990 |
| The Unitarian heritage : an architectural survey of chapels and churches in the Unitarian tradition in the British Isles | Hague, GrahamHague, Judy | Monograph or Collective Volume | | 1986 |
| The use of vestry books in family history research | Ní Mhurchadha, Maighréad | Article in Journal | | 2014 |
| The vegetational history of Monaincha over the last two millennia | Hall, Valerie | Article in Book | | 2007 |
| The very earliest plan of Clonmacnoise | Manning, Conleth | Article in Journal | | 1998 |
| The vestry records of the Parish of St Audoen, Dublin, 1636-1702 | | Monograph or Collective Volume | Four Courts | 2012 |
| The Vestry Records of the Parish of St. John the Evangilist : Dublin, 1595-1658 | | Monograph or Collective Volume | Four Courts Press|The Representative Church Body Library | 2004 |
| The vestry records of the parishes of St. Catherine and St. James, Dublin, 1651-1692 | | Monograph or Collective Volume | Four Courts | 2004 |
| The Vestry records of the united parishes of Fingas, St Margaret's, Artane and the Ward, 1657-1758 | | Monograph or Collective Volume | Four Courts in association with the Representative Church Body Library | 2007 |
| The vicars of Newry, with lists of curates and churchwardens | Swanzy Henry B. | Monograph or Collective Volume | R. Carswell & Son | 1927 |
| The view from the shore : perceiving island monasteries in early medieval Ireland | Ó Carragáin, Tomás | Article in Journal | | 2013 |
| The Viking impact on Glendalough | Etchingham, Colmán | Article in Book | | 2011 |
| The village of Kill revisited | Cowman, Des | Article in Journal | | 2019 |
| The vision of St Fursa in thirteenth-century didactic literature | Wilson, Chris | Article in Book | | 2011 |
| The vision of Tnugnal | | Monograph or Collective Volume | | 1989 |
| The visit of Cardinal Vannutelli, Papal Legate, to Ireland, 1904 | Fitzgerald, Desmond | Article in Journal | | 2006 |
| The visitation note book of Charles Lindsay, bishop of Kildare, 1804-1808 | Refaussé, Raymond | Article in Journal | | 1987 |
| The visitation of the archbishop of Cashel to Waterford and Limerick, 1374-5 | Logan, F. Donald (Francis Donald), 1930- | Article in Journal | | 1976 |
| The visitation of the parishes of Armagh 'inter Hibernicos' in 1546 | Jefferies, Henry A. | Article in Book | | 2000 |
| The visual culture of the Hospitaller Knights of the Priory of Ireland | Caffrey, Paul | Article in Book | | 2015 |
| The wardenship of Galway | Kelly, Richard J. | Article in Journal | | 1909 |
| The Wardenship of Galway | Kelly, Richard J. | Article in Journal | | 1909 |
| The Wardenship of Galway | Coen, Martin | Article in Book | | 1984 |
| The wardenship of Galway | Coen, Martin | Monograph or Collective Volume | Kenny's Bookshop | 1984 |
| The wardenship of Galway in the early-nineteenth century | Coen, Martin, Rev. | Thesis | | 1967 |
| The Welsh chapel in Dublin | Blythe, Ernest, 1889-1975 | Article in Journal | | 1957 |
| The Willis family of Wexford | Rafferty, Celestine | Article in Book | | 2005 |
| The windows of St Peter's | O'Brien, Seamus | Article in Journal | | 2012 |
| The works of Archbishop Laud | Laud, William | Monograph or Collective Volume | [s.n.] | 1847 |
| The “Glattjoch chapel in honour of St Virgil” - an Irish oratory in Austria/central Europe? | Fauler, Volker | Article in Journal | | 1994 |
| Theobald Walter and the abbey of Owney | Butler, R. | Article in Journal | | 1992 |
| These seventy years : a history of All Saints' Parish, Belfast | Leathem, William S. | Monograph or Collective Volume | News-Letter [Printer] | 1959 |
| Thesis abstract : the provision, building and architecture of Anglican churches in the North of Ireland, 1600-1740 | Roulston, William J. | Article in Journal | | 2005 |
| Thirty centuries in south-east Antrim : the parish of Coole or Carnmoney | Clarke, H. J. St. J., Rev. | Monograph or Collective Volume | The Quota Press | 1938 |
| Thomas A. Cobden, 1794-1842 : an architect in County Carlow | McDonnell, Thomas | Article in Book | | 2008 |
| Thomas Beckett and Ireland | Staunton, MichaelÓ Clabaigh, Colmán N. | Article in Book | | 2011 |
| Thomas Dease, bishop of Meath and some questions concerned with the rights to ecclesiastical property alienated at the reformation | Rice, Gerard | Article in Journal | | 1975 |
| Thomas Earley, manufacturer of ecclesiastical furniture and stained-glass windows, Upper Camden Street | Cannon, Max | Article in Journal | | 2021 |
| Thomas F. Ryan S.J. From Cork to China and Windsor Castle, 1889-1971 | Morrissey, Thomas J. | Monograph or Collective Volume | Columba Press | 2010 |
| Thomas Fleming, O.F.M., bishop of Leighlin (1432-c.58), cited to a provincial council at Ferns | Lynch, Anthony | Article in Journal | | 1993 |
| Thomas Milles, Bishop of Waterford and Lismore | Finnegan, Rachel | Article in Journal | | 2013 |
| Thoughts on the early Christian church | Ó Conchúir, Doncha | Article in Journal | | 1993 |
| Three centuries of life in a Tyrone parish : a history of Donagheady from 1600 to 1900 | Roulston, William J. | Monograph or Collective Volume | Strabane History Society | 2010 |
| Three early 19th century diocesan reports | O'Shea, Kieran | Article in Journal | | 1977 |
| Three early nineteenth century diocesan reports | O'Shea, Kieran | Article in Journal | | 1977 |
| Three mausolea and a church: the drawings of James C. Murphy for his book on Batalha of 1795 | McCarthy, Michael | Article in Journal | | 2008 |
| Three nineteenth-century drawings of Clonmacnoise | Harbison, Peter | Article in Book | | 2003 |
| Tigernán Ua Ruairc and a Twelfth-Century Royal Grant in the Book of Kells | Casey, Denis | Monograph or Collective Volume | Four Courts | 2020 |
| Tintern Abbey county Wexford : Cistercians and Colcloughs, eight centuries of occupation | | Monograph or Collective Volume | Friends of Tintern | 2003 |
| Tintern Abbey, county Wexford | Colfer, Billy | Article in Book | | 2003 |
| Tipperary material in Ossory archives | Ó Fearghail, Fearghus | Article in Journal | | 2006 |
| Tipperary's gift to China : three apostolic lives, 1863-1898 | | Monograph or Collective Volume | Kessinger Publishing | 2007 |
| Tithe defaulters for Co. Tipperary, 1831 | McCormac, Stephen | Monograph or Collective Volume | Stephen McCormac | 1996 |
| Tithe, parish and priest in the ecclesiastical province of Dublin, c.1100-1540 | Smith, Charles V. | Thesis | | 2005 |
| To this you belong | Fair, J. A. | Monograph or Collective Volume | Northern Whig [Printer] | 1979 |
| Togher celebrates and remembered | Bradley, John | Article in Journal | | 2017 |
| Tomaltach Ua Conchobair, coarb of Patrick, 1181-1201 | Gwynn, Aubrey | Article in Journal | | 1977 |
| Tomás Ó Fiaich | Ó Glaisne, Risteárd, 1927-2003 | Article in Journal | | 1992 |
| Tomás Ó Fiaich - saol agus saothar i Maigh Nuad | Ó Doibhlin, Diarmaid | Article in Book | | 1995 |
| Tombstone inscriptions of the Carmelite abbey, Loughrea, Co. Galway | Martyn, Adrian James | Article in Journal | | 2007 |
| Tomfinlough (Fenloe) church and graveyard | Gilmore, Hilary | Article in Journal | | 2004 |
| Towards 2000: a history of St. Mark's Church Armagh, 1811-2000 | Halligan, Marjorie | Monograph or Collective Volume | [The author] | 2002 |
| Towards a new 'Monasticon Hibericum' | Nicholls, K. W. (Kenneth W.) | Article in Journal | | 1984 |
| Towers, spires and pinnacles : a history of the cathedrals and churches of the Church of Ireland | Hutchison, Sam, 1933- | Monograph or Collective Volume | Wordwell | 2003 |
| Townland and parish boundaries in County Limerick | Hodkinson, Brian | Article in Journal | | 2016 |
| Townland atlas of Ulster | Kane, Andrew | Monograph or Collective Volume | Ulster Historical Foundation | 2024 |
| Tracing the cultural legacy of Irish Catholicism : from Galway to Cloyne and beyond | Maher, EamonO'Brien, Eugene | Monograph or Collective Volume | Manchester University Press | 2017 |
| Tracing your ancestors in Northern Ireland : a guide to ancestry research in the Public Record Office of Northern Ireland | Maxwell, Ian,McGrath, Grace | Monograph or Collective Volume | The Stationery Office | 1997 |
| Tradition and Irish local records | Edwards, R. W. D. (Robert Walter Dudley) | Article in Journal | | 1973 |
| Traditional religion in sixteenth-century Gaelic Ireland | Gillespie, Raymond | Article in Book | | 2014 |
| Transcripts from the monuments in Callan Church | Shelly, Thomas | Article in Journal | | 1879 |
| Transeptal churches of the regular canons in Ireland | O’Keeffe, Tadhg | Article in Book | | 2019 |
| Transforming women religious? Church reform and the archaeology of female monasticism in Ireland | Collins, Tracy | Article in Book | | 2019 |
| Trapped between two worlds : Edward Nangle, Achill Island and sectarian competition in Ireland, 1800-1862 | Kelley, Thomas | Thesis | | 2004 |
| Treasured heirlooms | MacGrath, K. M. | Article in Journal | | 1946 |
| Trinity College Mission in Belfast (founded 1912): a short story of its origin its growth its prospects | Barton, A. W.,Gwynn, R. M.,Hannon, GordonHayes, E. C.,Manning, W. R. F., | Monograph or Collective Volume | [Adams] | 1920 |
| Trinity Presbyterian Church, Bailieborough, the first 125 years : 1887-2012 | McKeague, Leslie | Monograph or Collective Volume | Bailie Publications | 2013 |
| Trouble with the archbishop in thirteenth-century Dublin | Smith, Charles | Article in Book | | 2015 |
| Tuaim of the Rath Breasail synod | Connellan, M. J. | Article in Journal | | 1952 |
| Tuam by Thomas B. Costello, M.D., M.R.I.A. - Catholic Truth Conference Programme, 1936 | Costello, Thomas B. | Article in Journal | | 2014 |
| Tuamgraney Church | Ó Carragáin, Tomás | Article in Journal | | 2014 |
| Tuarascáil bheag ar Chill Maolchéadair | Ó Dubhda, Seán | Article in Journal | | 1953 |
| Túath, Manor and Parish: Kingdom of Fir Maige, Cantred of fermoy | MacCotter, Paul | Article in Journal | | 2012 |
| Tulla, Co. Clare : ancient church site? | Griffin, Kevin A. | Article in Journal | | 2002 |
| Tulsk Abbey | Keegan, MarkO'Connor, KieranTiernan, Padraig | Article in Journal | | 1996 |
| Turas Mhíchíl Uí Iceadha chun na Róimhe (cuid a dó): moilliú agus toirmeasc | Briody, Mícheál | Article in Journal | | 2016 |
| Turas Mhíchíl Uí Iceadha chun na Róimhe (cuid a haon) | Briody, Mícheál | Article in Journal | | 2015 |
| Twelfth and thirteenth century Irish stonemasons in Regensburg (Bavaria) and the end of the 'school of the west' in Connacht | Harbison, Peter | Article in Journal | | 1975 |
| Twice built : The construction of St. Patrick's church, Monkstown, 1861-1866 | Conlon, Tom | Monograph or Collective Volume | Genealogical Society of Ireland | 2016 |
| Two Clogher constitutions | O'Sullivan, William, 1921-2000 | Article in Journal | | 1996 |
| Two Clogher constitutions | O'Sullivan, William, 1921-2000 | Article in Book | | 1994 |
| Two decorated fonts in Drogheda, Co. Louth | Roe, Helen M. | Article in Journal | | 1976 |
| Two early eighteenth century bishops of Killaloe | Murphy, Ignatius | Article in Journal | | 1986 |
| Two early medieval monasteries | Horn, Walter | Article in Book | | 1973 |
| Two ecclesiastical bells : St Patrick's (and its shrine) and the bell of Armagh | Batchelor, John | Article in Journal | | 1992 |
| Two historic chalices : the Rev. B. Peter Magauran chalice 1820, the Cloonclare chalice 1596 | Traynor, Owen | Article in Journal | | 1983 |
| Two hundred years of Shandon bells : a short account of the church and bells of St Ann, Shandon, Cork | Tuckey, J. W. T. | Monograph or Collective Volume | [St Ann, Shandon] | 1952 |
| Two Meath churches | Brandt, RuthMcCormick, Liam | Article in Journal | | 1983 |
| Two Romanesque fonts in Wexford. | Corlett, Christiaan | Article in Journal | | 2012 |
| Two sixteenth century Munster primates : Donnchadh Ó Taidhg (1560-62) & Richard Creagh (1564-85) | O'Brien, W. P. | Article in Journal | | 1989 |
| Two thousand years of Christianity and Ireland : lectures delivered in Christ Church Cathedral Dublin, 2001-2002 | | Monograph or Collective Volume | Columba | 2006 |
| Uaitéar Ó Loingsigh, Easbog Chluain Fearta (1647-63) | Mac Fhinn, Pádraig Eric, 1895-1987 | Article in Journal | | 1942 |
| Uí Máil and Glendalough | Mac Shamhráin, Ailbhe | Article in Book | | 2011 |
| Uilliam Buide Ó Cellaig and the late medieval renaissance of the Uí Maine lordship | Curley, Daniel | Article in Book | | 2021 |
| Ulsterheart : an ancient Irish habitation | Ingram, Brett | Monograph or Collective Volume | All-Ireland Heritage | 1989 |
| Ulsterville Presbyterian church Belfast : a history | Carson, C. T. E. | Monograph or Collective Volume | Ulsterville Presbyterian Church | 1992 |
| Ultramontanism in Quebec and the Irish connection | Bowen, Desmond | Article in Book | | 1988 |
| Un diocése de l'Église Établei d'Irlande à l'Epoguq Georgienne d'Aprés une visite episcopale : Ossory | Loupès, Philippe | Article in Journal | | 1983 |
| Un diocèse établie d'Irlande à l'éopoque georgienne, d'après une visite épiscopale : Ossory | Loupès, Philippe | Article in Journal | | 1983 |
| Uncovering an Anglo-Norman manor and deserted medieval village | Rheinisch, Siobhán | Article in Journal | | 2013 |
| Understanding the abbacy: an episcopal manor and its landscape at Ardquin, county Dowm | McQuillan, Liam | Article in Journal | | 2018 |
| Une diocèse de l'Église établie d'Irlande à l'époque georgienne, d'après une visite épiscopale : Ossory | Loupès, P. | Article in Journal | | 1983 |
| Unfinished business: Thomas Duff of Newry | Casey, Christine | Article in Journal | | 2019 |
| Unfinished pilgrimage : the story of Belfast Cathedral | Young, John A. | Monograph or Collective Volume | Friends of Belfast Cathedral | 1945 |
| Unforgivable trespasses : the Irish Hospitallers and the defence of their rights in the mid-thirteenth century | Virtuani, Paolo | Article in Book | | 2015 |
| Unfulfilled mediocrity: the hapless career of Dominick Madden in the west of Ireland | McCarthy, Patricia,Mulligan, Kevin V. | Article in Journal | | 2006 |
| Union of the dioceses of Glendaloch and Dublin in 1216 | Ronan, Myles V. (Myles Vincent) | Article in Journal | | 1930 |
| United Methodism, ecumenism and acclesiology | Abraham, William J. | Article in Journal | | 2016 |
| University Church : towards a stylistic context | McCarthy, Michael (Michael Joseph), 1939-2010 | Article in Journal | | 2003 |
| Urney Church | O'Connell, Mary | Article in Journal | | 2000 |
| Using church records in family research : Alexander Forrest of Dungiven, county Derry | Forrest, R. | Article in Journal | | 2003 |
| Ussher and the Church of Ireland | Knox, R. Buick | Article in Journal | | 1960 |
| Vatican archives Minutae brevium in forma gratiosa relating to Clogher diocese | Haren, M. J. | Article in Journal | | 1985 |
| Vatican II : the Irish experience | Lane, Dermot A. | Article in Book | | 2004 |
| Venice in Cavan : the career of William Bedell, 1572-1642 | McCafferty, John | Article in Book | | 2009 |
| Vestry Book of the Parish of Aghalow (Caledon Co. Tyrone) with an account of the family of Hamilton of Caledon 1691-1807 | Marshall, John J. | Monograph or Collective Volume | Tyrone Printing Co. | 1935 |
| Vestry minutes - a useful tool | Heueston, John | Article in Journal | | 2004 |
| Victorius vs Dionysius : the Irish Easter controversy of AD 689 | Warntjes, Immo | Article in Book | | 2015 |
| Viking and ecclesiastical interactions in the Irish Sea area from the 9th to 11th centuries | Ramsey-Brimberg, Danica | Monograph or Collective Volume | Routledge | 2024 |
| Viking-age sculpture in North-West Wales : wealth, power, patronage and the Christian landscape | Edwards, Nancy | Article in Book | | 2011 |
| Vir Apostolicus : St. Peter and the claim of apostolicity in early medieval Ireland | Picard, Jean-Michel | Article in Book | | 2015 |
| Virgil als abt und Bischof von Salzburg | Wolfram, Herwig | Article in Book | | 1985 |
| Virgil als geistiger Vater der Slawenmission und der ältesten slawischen Kirchensprache | Kronsteiner, Otto | Article in Book | | 1985 |
| Virgil und die Salzburger Slawenmission | Kahl, Hans-Dietrich | Article in Book | | 1985 |
| Virgils Bild strahlt nun heller | Ritschel, Karl Heinz | Article in Book | | 1985 |
| Viscount Ards and the presbytery : politics and religion among the Scots of Ulster in the 1640s | Armstrong, Robert (Robert Matthew) | Article in Book | | 2009 |
| Visions materialised : the building of St Colman's Cathedral, Cobh (1868-1917) | Wilson, Ann | Article in Book | | 2004 |
| Visitatio regalis of Ardagh, 1615 | Gray, P. | Article in Journal | | 1940 |
| Visualizing Ireland's first cardinal | Cullen, Fintan | Article in Book | | 2011 |
| Vita Sancti Cóemgeni : an edition of the earliest manuscript version | Ó Riain-Raedel, Dagmar | Article in Book | | 2011 |
| Waiting for the registrar : appeal at the metropolitan court of Armagh | Sughi, Mario A. | Article in Journal | | 1999 |
| Walter Wellesley, bishop of Kildare, 147? - 1539 | Valkenburg, Augustine | Article in Journal | | 1970 |
| Was Sulien at Glendalough? | Doherty, Charles | Article in Book | | 2011 |
| Was the Builder of the ‘Crazy Vault’ Actually Crazy? Reaction and Response in the Thirteenth Century at Lincoln Cathedral | Alexander, Jennifer S. | Article in Book | | 2021 |
| Waterford 1470: Dean John Collyn and the Chantry Chapel of St Saviour | Byrne, Michael | Monograph or Collective Volume | Choice Publishing | 2013 |
| Waterford and Westminster Abbey | Brophy, Anthony | Article in Journal | | 2018 |
| Waterford diocese, 1096-1363, part 4 : the diocesan chapter and extents of the diocese | O'Neill, Assumpta | Article in Journal | | 1992 |
| We like the red bricks | Bingham, Barbara | Article in Journal | | 2008 |
| Welcoming, witnessing and waiting to serve : a short history of Lucan Methodist Church | Waddington, Shelagh B. | Monograph or Collective Volume | Lucan Methodist Church | 2004 |
| Well worth a visit : Knockbreda parish church and its architect | Dixon, Hugh | Article in Book | | 2003 |
| Were early Irish church establishments under lay control? | Holland, Martin | Article in Book | | 2006 |
| Westport's Presbyterian Church and its congregation | Crowe, Noelene Backett | Article in Journal | | 2018 |
| What a bishop of the Church of Ireland can do. An exposure of a scandal | Westropp, C. Roberts, Rev. | Monograph or Collective Volume | Hillhouse | 1909 |
| What did the Royal almoner do in Britain and Ireland, c. 1450-1700 | Houston, Robert A. | Article in Journal | | 2010 |
| What happened to Fr Seán Fagan? | Hanley, Angela | Monograph or Collective Volume | Columba Press | 2019 |
| What were Patrick's alphabets? | Márkus, Gilbert | Article in Journal | | 1996 |
| When the O'Tunneys went north? The late medieval architecture of Devenish in an Ossory architectural context | O'Donovan, Danielle | Article in Journal | | 2015 |
| Where Donard guards | Russell, Nicholas | Monograph or Collective Volume | Ballaghbeg Books | 2007 |
| Where neither moth nor rust doth corrupt | Dempsey, Michael | Article in Journal | | 2006 |
| Where was Ráith Breasail? | Ó Murchadha, Diarmuid | Article in Journal | | 1999 |
| Where was Rath Breasail's Sliab Beatha? | Schlegel, Donald M. | Article in Journal | | 2012 |
| Whitby and All That : The Search for Anglican Origins | Holder, Arthur G. | Article in Journal | | 2003 |
| Whitby and Clonmacnoise | Emerick, Keith | Article in Book | | 2003 |
| White Island church door | Davies, Oliver | Article in Journal | | 1939 |
| White Island, Lough Erne : its ancient church and unique sculptures | Lowry-Corry, Dorothy | Article in Journal | | 1930 |
| Who is leading? Archbishop John Thomas Troy and the priests and people in the Archdiocese of Dublin, 1787-1823 | McNally, Vincent J. | Article in Journal | | 1995 |
| Who succeeded Blessed Oliver Plunkett? | Ó Fiaich, Tomás | Article in Journal | | 1956 |
| Why were there so few papal provisions in thirteenth-century Dublin? | Smith, Thomas W. | Article in Book | | 2020 |
| Wicklow and the Eucharistic Congress 1932 | Finlay, John | Article in Journal | | 2012 |
| Wicklow's "hidden" heritage | Jennings, Robert, Canon | Article in Journal | | 2003 |
| William Burges (1827-1881) and the building of St. FinBarre's cathedral | Beckett, J. C. | Monograph or Collective Volume | [Friends of St FinBarre's Cathedral] | 1983 |
| William Connor Magee, the Church of England and the Church of Ireland | Megahey, Alan | Article in Book | | 2006 |
| William Crolly, Archbishop of Armagh 1835-49 | McCauley, Ambrose | Article in Journal | | 1989 |
| William Crolly, archbishop of Armagh, 1835-1849 | Macaulay, Ambrose | Monograph or Collective Volume | Four Courts | 1994 |
| William Fisher and the church of the poor : the story of Teampol na mBoct in Altar Townland, West Cork | | Monograph or Collective Volume | [Kilmoe Union of Parishes] | 1997 |
| William J. Walsh, archbishop of Dublin | Walsh, Patrick | Monograph or Collective Volume | Talbot Press | 1928 |
| William King (1650-1729), man of faith and reason | Richardson, Joseph | Thesis | | 1998 |
| William Mark Duke, archbishop | Walsh, C. J. | Article in Journal | | 1988 |
| William Marshall and Ireland | | Monograph or Collective Volume | Four Courts Press | 2017 |
| William Powell at Maynooth : an episode of religious politics in 1630s Kildare | Gillespie, Raymond | Article in Journal | | 2019 |
| William Reeves, 1815-92 | Hamlin, Ann | Article in Book | Four Courts | 2012 |
| William Reeves, historian, in the shadow of the second reformation | Ó Riain, Pádraig | Article in Journal | | 2018 |
| William Somerwell's notarial, memorandum book and Archbishop John May | | Article in Journal | | 2001 |
| William Thomas Latimer (1842-1919); churchman and historian | Ó Conluain, Proinsias | Article in Journal | | 2006 |
| William Walsh, first archbishop of Halifax (1804-1858) | Kelly, Charlotte | Article in Journal | | 1945 |
| Willowfield parish church, Belfast, 1872-1972 | Taylor, A. R. | Monograph or Collective Volume | [A.R. Taylor] | 1972 |
| Wills and other probate records : a practical guide to researching your ancestor's last documents | Grannum, KarenTaylor, Nigel | Monograph or Collective Volume | National Archives | 2004 |
| With God's assistance. On the 150th anniversary of its completion, Michael O'Neill traces key chapters in the Pakenham-Guinness restoration of St Patrick's Cathedral 1845-1865 | O'Neill, Michael | Article in Journal | | 2015 |
| Witness in the city: a history of St. Thomas' Parish Church, Belfast | Douglas, Carol,Douglas, Colin,Douglas, Mervyn | Monograph or Collective Volume | [St. Thomas' Parish Church] | 2002 |
| World War I chalice returns home | Canning, B. J. (Bernard J.) | Article in Journal | | 2013 |
| Writing Robert Dunne : Brisbane's first Catholic archbishop | Byrne, Neil J. | Article in Book | | 1995 |
| Zula the Greek | Cooper, Joseph | Article in Journal | | 2000 |
| ‘Ag so scéal uafásach eile...': scéalaíocht na seanmóire. | Ó Dúshláine, Tadhg | Article in Book | | 2000 |
| ‘Standing one's ground' : religion, polemic and Irish history since the Reformation | Ford, Alan, 1956- | Article in Book | | 1995 |
| ‘Suitable men of good repute’ and a ‘public fornicator’: the many priors of St John’s hospital in Dublin | O’ Keeffe, Grace | Article in Book | | 2023 |
| ‘The Construction and Decoration of Cormac’s Chapel at Cashel’: Some Recent Observations ‘After’ Professor Roger Stalley | Mulvin, Lynda S | Article in Book | | 2021 |
| ‘The Pale at prayer’: lived religious experience in Anglo-Norman: Dublin’s two cathedrals | Sullivan, John William | Article in Book | | 2020 |