| Alexandri III Romani Pontificis Opera omnia, id est epistolae et privilegia ordine chronologico digesta : accedunt variorum ad ipsum epistola | | Monograph or Collective Volume | | 1855 |
| Calendar of entries in the papal registers relating to Great Britain and Ireland | Anonymous | Monograph or Collective Volume | HMSO | 1955 |
| 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 : vol. 14 : papal letters, 1484-1492 | | Monograph or Collective Volume | Stationery Office | 1960 |
| Calendar of entries in the papal registers relating to Great Britain and Ireland. Vol. 13, parts 1-2 | | Monograph or Collective Volume | [s.n.] | 1955 |
| 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 volume 16 of the Fondo di Vienna in Propaganda archives, part 2, ff 103-216 | Millett, Benignus | Article in Journal | | 1998 |
| Confronting modernity : Pope Leo XIII, Rerum novarum, and the Catholic Church in Ireland and Poland, 1878-1914 | Luminiello, Rose | Thesis | | |
| Conquest as Crusade: Ireland’s invasion and a colonial plea to the papacy | Callan, Maeve | Article in Book | | 2022 |
| Correspondence of Irish interest in the Lettere in Propaganda Archives : vols. 27-34 (1649-64) | Millett, Benignus | Article in Journal | | 1988 |
| Early Christian Ireland | De Paor, LiamDe Paor, Máire | Monograph or Collective Volume | Thames & Hudson | 1958 |
| Expecting no recompense on this side of the grave : the Irishmen of the papal army in Italy in 1860 | O'Driscoll, Florry | Article in Book | | 2015 |
| Gallicanism at Maynooth : Archbishop Cullen and the royal visitation of 1853 | Corish, Patrick J. | Article in Book | | 1979 |
| Henry II and the ideological foundations of Angevin rule in Ireland | Veach, Colin T. | Article in Journal | | 2018 |
| Ignazio Persico's 'Relazione sulla condizione religiosa e civile d'Irlanda' (1887) | Belletti, Alberto | Article in Journal | | 2019 |
| In a corner of seventeenth-century Rome | Woods, Penelope | Article in Book | | 2015 |
| Inventario dei Registri Vaticani | Giusti, Martino | Monograph or Collective Volume | | 1981 |
| Ireland and the Vatican : the politics and diplomacy of church-state relations, 1922-1960 | Keogh, Dermot | Monograph or Collective Volume | Cork University Press | 1995 |
| Ireland, the Vatican and the Cold War : the case of Italy, 1948 | Keogh, Dermot | Article in Journal | | 1991 |
| L'Archivio Segreto Vaticano | Giusti, Martino | Monograph or Collective Volume | | 1978 |
| Letter of Pope Innocent VIII, 4 December 1488 | Anonymous | Article in Book | | 1991 |
| Letters and papers of archbishop Ignazio Persico, papal commissary to Ireland, 1887-1888 | O'Callaghan, Edward P. | Article in Journal | | 1993 |
| Making monsters out of one another in the early fourteenth-century British Isles. The Irish Remonsrtance, the Declaration of Arbroath, and the Anglo-Irish Counter-Remonstrance | Callan, Maeve | Article in Journal | | 2019 |
| Monsignor O'Riordan, Bishop O'Dwyer and the shaping of new relations between nationalist Ireland and the Vatican during World War I | De Wiel, Jérôme aan | Article in Journal | | 1999 |
| Opening address | Boyle, Leonard E. | Article in Book | | 1996 |
| Pontifica Hibernica : medieval papal documents concerning Ireland 640-1261, vol. 2 | | Monograph or Collective Volume | Gill | 1965 |
| The 'papal letters to the Irish' cited by Bede : how did he get them? | Herren, Michael | Article in Book | | 2015 |
| The beginnings of a national protectorate : curial cardinals and the Irish church in the 15th century | Walsh, Katherine | Article in Journal | | 1974 |
| The Bull Laudabiliter | Norgate, Kate | Article in Book | | 2009 |
| The early Irish church and the Holy See | Ryan, J. | Article in Journal | | 1960 |
| The embassy in Ireland of Monsignor G. B. Rinuccini, Archbishop of Fermo, in the years 1645-49 | Lenihan, Maurice | Article in Journal | | 1883 |
| The impossible diplomatic mission of Giovanni Battista Rinuccini 1645-1649 | O'Sullivan, T. F. | Article in Journal | | 1993 |
| The Irish remonstrance of 1317 : an international perspective | Phillips, J.R.S. (John Roland Seymour) | Article in Journal | | 1990 |
| The Irish remonstrance of 1317 : an international perspective | Phillips, J.R.S. (John Roland Seymour) | Article in Book | | 2009 |
| The Italian connection : the great earl and Archbishop Octavian | Sughi, Mario | Article in Journal | | 1999 |
| The letters of Innocent III to Ireland : a calendar ... | | Article in Journal | | 1962 |
| The papacy and Ireland in the fifteenth century | Watt, J. A. | Article in Book | | 1984 |
| The reception of My Lord of Ormonde at Kilkenny upon the first peace 1646 | Fletcher, Alan J. | Article in Journal | | 2003 |
| The remonstrance of Irish princes, 1317 | Scully, Diarmuid | Article in Journal | | 2013 |
| The Vatican, the Bishops and Irish Politics 1919-39 | Keogh, Dermot | Monograph or Collective Volume | Cambridge University Press | 1986 |
| Vatican diplomacy and the mission of Rinuccini to Ireland | Ó hAnnracháin, Tadhg | Article in Journal | | 1993 |
| Wexford support for the Pope in 1870 | Murphy, Hilary | Article in Journal | | 1992 |
| Why were there so few papal provisions in thirteenth-century Dublin? | Smith, Thomas W. | Article in Book | | 2020 |