| 'Between the Devil and the Deep Blue Sea' : Irish Women, Catholicism and Colonialism | Rossiter, A. | Article in Book | | 1992 |
| A criminal profile of the Liverpool Irish | Neal, Frank | Article in Journal | | 1991 |
| A hidden Church? The structure of Catholic Dublin in the mid-eighteenth century | Burke, Nuala | Article in Journal | | 1974 |
| A history of St Columba's College 1843-1974 | White, G. K. | Monograph or Collective Volume | Old Columban Society | 1980 |
| A history of the diocese of Cork : from reformation to the penal era | Bolster, Evelyn | Monograph or Collective Volume | Tower Books | 1982 |
| A lodge of Irishmen at Lisbon, 1738 | Vatcher, S. | Article in Journal | | 1971 |
| A meeting of priests in Co. Derry, 1669 | Lynch, Anthony | Article in Journal | | 1991 |
| A pastoral letter to the catholic clergy of the united dioceses of Waterford and Lismore | Hussey, Thomas | Monograph or Collective Volume | | 1797 |
| A short history of the attempts ... to convert the popish natives of Ireland to the Established Religion with a Proposal for their Conversion | Richardson, John | Monograph or Collective Volume | | 1712 |
| A short-title calendar of Hibernia, 5 : 1894-9, and of Irish material in Saxonia S. Crucis, 3 : 1890-1900, in the General Archives of the Friars Minor, Rome | Conlan, Patrick, 1940- | Article in Journal | | 1985 |
| A short-title calendar of the papers of Archbishop Michael Slattery in Archbishop's House, Thurles, 3 : 1846 | Tierney, M. | Article in Journal | | 1991 |
| 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 |
| An essay ... on ecclesiastical finance, as regards the Roman Catholic church in Ireland | Croly, D. O. | Monograph or Collective Volume | | 1834 |
| An interrogation carried out in Cork in 1600 by the Ecclesiastical High Commission for Recusancy : a document from Laud ms. 612, Bodleian Library Oxford | Sheehan, A. J. (Anthony J.) | Article in Journal | | 1984 |
| An Irish counter-reformation bishop : John Roche | Corish, Patrick J. | Article in Journal | | 1959 |
| Analecta sacra, nova, et mira - De rebus catholicorum in Hibernia ... gestis | [Roth, David, R.C. Bishop of Ossory] | Monograph or Collective Volume | | 1616 |
| Andrew Campbell, bishop of Kilmore, 1753-1769 | Campbell, P. J. | Article in Journal | | 1977 |
| Andrew Campbell, bishop of Kilmore, 1753-1769 : student days in Spain | Walsh, Micheline | Article in Journal | | 1977 |
| Anti-Catholicism and Irish disturbances : public order in mid-Victorian Wolverhampton | Swift, R. | Article in Journal | | 1984 |
| Antiquarianism and architecture in eighteenth-century Ireland | Gill, LindaStokstad, Marilyn | Article in Book | NA | 1976 |
| Aspects of the continental education of Irish students in the reign of Elizabeth I | Hammerstein, Helga | Article in Book | | 1971 |
| Augustine Gibbon de Burgo : a study in early Irish reaction to Luther | Hennig, John | Article in Journal | | 1947 |
| Bishop Conor O'Devanney OFM c.1533-1612 | Silke, John J. | Article in Journal | | 1988 |
| Bishop James Moynagh of Calabar | Cooke, Colman M. | Monograph or Collective Volume | Columba Press | 2014 |
| Blessed Oliver Plunket and the Popish Plot in Ireland | Walker, Breifne | Article in Journal | | 1968 |
| Blessed Oliver Plunkett | Curtis, Emmanuel | Monograph or Collective Volume | Clonmore & Reynolds | 1963 |
| Burke's Irish history - a hypothesis | Weston, J. C. | Article in Journal | | 1962 |
| Calendar of volume 14 of the Fondo di Vienna in Propaganda Archives : part 3, ff. 284-395 | | Article in Journal | | 1990 |
| Canada | Monahan, A. P. | Monograph or Collective Volume | Gill | 1971 |
| Canon and martial law : William O'Brien, catholicism and Irish nationalism | Newsinger, John | Article in Journal | | 1981 |
| Canonical faculties on the Irish mission in the reign of Queen Elizabeth, 1558-1603 | Jones, F. M. | Article in Journal | | 1953 |
| Cardinal Cullen and Irish nationality | Steele, Edward David | Article in Journal | | 1975 |
| Cardinal Pole's absolution of George Browne, Henry VIII's archbishop of Dublin | Ronan, Myles V. (Myles Vincent) | Article in Journal | | 1949 |
| Catholic families of the Pale | Kingston, John | Article in Journal | | 1960 |
| Catholic Ireland in the Eighteenth Century. Collected Essays of Maureen Wall | Wall, Maureen (née Mac Geehin)
| Monograph or Collective Volume | Geography Publications | 1989 |
| Catholic loyalty to king and pope in 18th-century Ireland | Wall, Maureen (née Mac Geehin) | Article in Journal | | 1961 |
| Catholic marriage under the Penal Code | Corish, Patrick J. | Article in Book | | 1985 |
| Catholicism in Ulster, 1800-50 | Connolly, Sean J. | Article in Book | | 1981 |
| Catholics and socialists in Scotland, 1900-1930 | Gilley, Sheridan | Article in Book | | 1989 |
| Catholics in colonial America | Ellis, J. T. | Monograph or Collective Volume | | 1965 |
| Catholics, land and the popery acts of Anne | Osborough, W. N. (William Nial) | Article in Book | | 1990 |
| Challoner and St. Patrick's Day | Guazzelli, Victor | Article in Journal | | 1947 |
| Clogher diocesan archives | Forsythe, John | Article in Journal | | 1988 |
| Clogher diocesan papers, 2 | Forsythe, John | Article in Journal | | 1989 |
| Collections relating to the dioceses of Kildare and Leighlin. 3 vols. | | Monograph or Collective Volume | | 1883 |
| Competitive religious cultures in nineteenth-century Belfast | Hempton, David | Article in Journal | | 1990 |
| Confusion abounding : Bernard O'Higgins, O.S.A., bishop of Elphin, 1542-1561 | Martin, F. X. (Francis Xavier), 1922-2000 | Article in Book | | 1979 |
| Converts | Power, Thomas P. | Article in Book | | 1990 |
| Correspondence of Irish interest in the Lettere in Propaganda Archives : vols. 27-34 (1649-64) | Millett, Benignus | Article in Journal | | 1988 |
| Correspondence of Irish interest in the Lettere in Propaganda Archives, vol. 38 (1657-1664) | | Article in Journal | | 1990 |
| Croke of Cashel : the life of Archbishop Thomas William Croke, 1823-1902 | Tierney, Mark | Monograph or Collective Volume | Gill & Macmillan | 1976 |
| Daniel O'Connell | O'Ferrall, Fergus | Monograph or Collective Volume | Gill & Macmillan | 1981 |
| David Rothe, bishop of Ossory 1618-50 | Corish, Patrick J. | Article in Journal | | 1984 |
| De rebus in Hibernia gestis | Stanihurst, Richard | Monograph or Collective Volume | | 1584 |
| Denis Harty : vicar apostolic of Killaloe, 1657-1667 | Murphy, Ignatius | Article in Journal | | 1989 |
| Die Katholikenemanzipation in Grossbritannien und Irland. Ein Beitrag zur Geschichte religiöser Toleranz | Blötzer, Joseph | Monograph or Collective Volume | | 1905 |
| Dominicans in Ireland, 1841-1845 | Fenning, Hugh | Article in Journal | | 1991 |
| Donagh O'Daly O.S.M. 1600-c. 1664 - a forgotten Irish figure of the Counter-Reformation in Austria and Bohemia | Mooney, C. M. | Article in Journal | | 1979 |
| Douai College documents, 1639-1794 | | Monograph or Collective Volume | Catholic Record Society | 1972 |
| Dublin diocesan archives - Hamilton papers (1) | Purcell, Mary | Article in Journal | | 1988 |
| Dublin's turbulent priest : Cornelius Nary, 1658-1738 | Fagan, Patrick, 1922-2011 | Monograph or Collective Volume | Royal Irish Academy | 1991 |
| Early Irish Jesuit educators | Corcoran, Timothy Joseph, 1872-1943 | Article in Journal | | 1940 |
| Edmund Burke and Rome | Mahoney, T. H. D. | Article in Journal | | 1958 |
| Edmund Burke's Reflections on the coming revolution in Ireland | Conniff, James | Article in Journal | | 1986 |
| Edmund O'Reilly, archbishop of Armagh, 1657-1669 | Ó Fiaich, Tomás | Article in Book | | 1957 |
| Encyclopaedia of Ireland | | Monograph or Collective Volume | | 1968 |
| Endurance and emergence : Catholics in Ireland in the eighteenth century | | Monograph or Collective Volume | Irish Academic Press | 1990 |
| England and Ireland since 1800 | O'Farrell, Patrick James | Monograph or Collective Volume | Oxford University Press | 1975 |
| England, Ireland, and Rome, 1847-1848 | Kerr, Donal A. | Article in Book | | 1989 |
| Father Hugh O'Donnell, first parish priest of Belfast, 1772-1812 | Rogers, Patrick | Article in Book | | 1949 |
| Father John Colgan, O.F.M., 1592-1658 : essays in commemoration of the third century of his death | | Monograph or Collective Volume | | 1959 |
| Father Luke Wadding : commemorative volume | | Monograph or Collective Volume | | 1957 |
| Father Luke Wadding and St Isidore's College, Rome : biographical and historical note and documents | Cleary, Gregory | Monograph or Collective Volume | | 1925 |
| Father Luke Wadding and the Irish nation | Corish, Patrick J. | Article in Journal | | 1957 |
| Father Peter Wadding, S.J. : chancellor of the University of Prague, 1629-41 | O'Dea, Paul | Article in Journal | | 1941 |
| Florence Conry, Hugh de Burgo, Luke Wadding and Jansenism | Ceyssens, Lucien | Article in Book | | 1957 |
| Fr. Wolfe's description of Limerick city, 1574 | Bradshaw, Brendan | Article in Journal | | 1977 |
| Francis MacDonnell, OFM, son of the first earl of Antrim (d. 1636) | Giblin, Cathaldus | Article in Journal | | 1975 |
| From "victims" of the Melk reform to apostles of the Counter-Reformation : the Irish regular clergy in the Habsburg dominions | Walsh, Katherine | Article in Book | | 1989 |
| From militancy to social mission : the Salvation Army and street disturbances in Liverpool, 1879-1887 | Murdoch, N. H. | Article in Book | | 1992 |
| Gallicanism and the veto controversy : church, state and Catholic community in early nineteenth-century Ireland | Leighton, C. D. A. | Article in Book | | 1990 |
| Gallicanism at Maynooth : Archbishop Cullen and the royal visitation of 1853 | Corish, Patrick J. | Article in Book | | 1979 |
| Geoffrey Keating's Eochair Sgiath an Aifrinn and the Catholic Reformation in Ireland | Cunningham, Bernadette | Article in Book | | 1989 |
| 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 |
| Guide to documents of Irish and British interest in Fondo Borghese, ser. 1 | | Article in Journal | | 1961 |
| Hell or Connaught! the Cromwellian colonisation of Ireland, 1652-1660 | Ellis, Peter Berresford, 1943- | Monograph or Collective Volume | Hamish Hamilton | 1975 |
| Herrschaftlich-staatliche Gewalt, Gesellschaft, und Katholizismus in Irland vom 16-18 Jahrhundert .. | Hammermayer, Ludwig | Monograph or Collective Volume | | 1970 |
| Herrschaftlichstaatliche Gewalt, Gesellschaft und Katholizismus in Irland vom 16.-18. Jahrhundert | Hammermayer, Ludwig | Article in Book | | 1969 |
| History and politics : Macaulay and Ireland | Millgate, Jane | Article in Journal | | 1973 |
| History of the catholic archbishops of Dublin since the reformation. Vol. 1 | Moran, Patrick Francis, cardinal, 1830-1911 | Monograph or Collective Volume | | 1864 |
| Insurgent Wicklow 1798 : the story as written by Rev. Bro. Luke Cullen, O.D.C., 1793-1859. | Ronan, Myles V. (Myles Vincent) | Monograph or Collective Volume | | 1948 |
| Inventario dei Registri Vaticani | Giusti, Martino | Monograph or Collective Volume | | 1981 |
| Ireland and England | McDowell, R. B. (Robert Brendan), 1913-2011 | Article in Book | | 1971 |
| Ireland and the Holy See | Sheehy, Maurice P. | Article in Journal | | 1962 |
| Ireland and the Irish : a short history | Bottigheimer, Karl S. | Monograph or Collective Volume | Columbia University Press | 1982 |
| Ireland's first papal nuncio | Corish, Patrick J. | Article in Journal | | 1954 |
| Irish Catholics and the French revolution | O'Flaherty, Eamon | Article in Book | | 1990 |
| Irish Catholics and the parliamentary franchise, 1692-1728 | Simms, J. G. (John Gerald) | Article in Journal | | 1960 |
| Irish clerics in France in the seventeenth and eighteenth centuries : a statistical study | Brockliss, Laurence W. B.Ferté, Patrick | Article in Journal | | 1987 |
| Irish College, Rome : Kirby papers | Corish, Patrick J. | Article in Journal | | 1974 |
| Irish Franciscan mission to Scotland, 1619-46 : documents from Roman archives | | Monograph or Collective Volume | Assisi Press | 1964 |
| Irish history and papal archives | Corish, Patrick J. | Article in Journal | | 1954 |
| Irish immigrants and radical movements in the West of Scotland in the early nineteenth century | McCaffrey, J. F. | Article in Journal | | 1988 |
| Irish immigrants in Scotland : their priests, politics and parochial life | Walker, W. M. | Article in Journal | | 1972 |
| Irish Jesuit archives | O'Donoghue, Fergus | Article in Journal | | 1986 |
| Irish links with Bishop Challoner | Brady, John, d.1963 | Article in Journal | | 1946 |
| Irish parliamentary elections and the influence of the Catholic vote, 1801-20 | Jupp, Peter, 1940-2006 | Article in Journal | | 1967 |
| Irish peasant society | Connell, Kenneth Hugh | Monograph or Collective Volume | Clarendon Press | 1968 |
| Irish printing in the early seventeenth century | Gillespie, Raymond, 1955-2024 | Article in Journal | | 1988 |
| Irish soldiers and the Irish College in Paris, 1706-1791 | Walsh, Micheline | Article in Book | | 1978 |
| James Archer of Kilkenny : an Elizabethan Jesuit : first rector of the Irish College at Salamanca and ally of the great Hugh O'Neill | Morrissey, Thomas J. | Monograph or Collective Volume | Studies, Special Publication | 1979 |
| James II : a study in kingship. | Miller, John | Monograph or Collective Volume | | 1989 |
| James Martineau and the Catholic spirit amid the tensions of Dublin, 1828-1832 | Waller, Ralph | Article in Book | | 1989 |
| James Ussher, archbishop of Armagh | Knox, Robert Buick | Monograph or Collective Volume | | 1967 |
| John Callaghan and the controversies among the Irish in Paris, 1648-54 | Corish, Patrick J. | Article in Journal | | 1954 |
| John Henry Newman and Frank Duff | Kennedy, F. | Monograph or Collective Volume | Praedicanda Publications | 1982 |
| Kilkenny's short-lived university (Feb-July 1690) | Leonard, John | Article in Journal | | 1988 |
| L'Archivio Segreto Vaticano | Giusti, Martino | Monograph or Collective Volume | | 1978 |
| L'émigration irlandaise et les prêtres irlandais en France | Eliot, François | Article in Book | | 1978 |
| La missione di Sir Kenelm Digby all corte di Innocenze X, 1645-1648 | Gabrieli, V. | Article in Book | | 1954 |
| La propagation en Irlande des idées de la révolution française | Calkin, Homer L. | Article in Journal | | 1955 |
| Later relations between the Primate Peter Lombard and Hugh O'Neill | Silke, John J. | Article in Journal | | 1955 |
| Leading from behind? St. Patrick's College, Maynooth and the development of church music in Ireland, 1800 - 1914 | McCarthy, Darina | Article in Book | | 2018 |
| Liber Lovaniensis : a collection of Irish Franciscan documents, 1629-1717 | | Monograph or Collective Volume | Clonmore & Reynolds | 1956 |
| Lord Galway and the penal laws | Kelly, Patrick | Article in Book | | 1987 |
| Louvain papers, 1606-1827 | | Monograph or Collective Volume | Stationery Office for the Irish Manuscripts Commission | 1968 |
| Mannix, de Valera and Irish nationalism | Keogh, Dermot | Article in Book | | 1991 |
| Mary : a history of devotion in Ireland | O'Dwyer, Peter | Monograph or Collective Volume | | 1988 |
| Maynooth : students and ordinations 1895-1984 | Hamell, P. J. | Monograph or Collective Volume | | 1984 |
| Maynooth and Georgian Ireland | Newman, Jeremiah | Monograph or Collective Volume | Kenny | 1979 |
| Maynooth and Victorian Ireland | Newman, Jeremiah | Monograph or Collective Volume | Kenny's Bookshops & Art Galleries | 1983 |
| Measgra i gcuimhne Mhichíl Uí Chléirigh. Miscellany of historical and linguistic studies in honour of Brother Michael Ó Cléirigh, chief of the Four Masters, 1643-1943 | | Monograph or Collective Volume | Assisi Press | 1944 |
| Memoirs of Richard Whately, Archbishop of Dublin | | Monograph or Collective Volume | Richard Bentley | 1864 |
| Memoirs of the marquess of Rockingham and his contemporaries. 2 vols. | | Monograph or Collective Volume | | 1852 |
| Municipal reform and the repeal movement in Cork, 1833-1844 | Cronin, Maura (née Murphy) | Article in Journal | | 1976 |
| New Zealand | Duggan, Eileen | Monograph or Collective Volume | Gill | 1971 |
| New Zealand Catholicism and the Irish issue, 1914-1922 | Sweetman, Rory M. | Article in Book | | 1989 |
| Notices sur les établissements religieux anglais, écossais et irlandais fondés à Paris avant la Révolution | Daumet, Georges | Article in Journal | | 1912 |
| Nunziatura in Irlanda | Aiazzi, Giuseppe | Monograph or Collective Volume | | 1844 |
| O'Connell and German politics | Alter, Peter | Article in Book | | 1991 |
| Oideadh an Athar Uí Shíthigh | De Bhail, Tomás | Monograph or Collective Volume | | 1954 |
| Oliver Plunkett, 2 : In his own words | Forristal, Desmond | Monograph or Collective Volume | Veritas | 1975 |
| Owen Roe O'Neill and the struggle for catholic Ireland | Casway, J. I. | Monograph or Collective Volume | | 1984 |
| Pádraigín Haicéad, O.P., 1604?-1654 | Valkenburg, Augustine | Article in Journal | | 1985 |
| Papers of Richard Joachim Hayes, OFM, 1810-1824, in the Franciscan Library, Killiney : part 8, August-December 1817 | Giblin, Cathaldus | Article in Journal | | 1988 |
| Parnassus in Waterford. (Apropos of Latin Proses) | Wall, Thomas | Article in Journal | | 1947 |
| Parnell and the Catholic church | Woods, C. J. (Christopher John) | Article in Book | | 1991 |
| Paul Cullen and his contemporaries : with their letters from 1820 to 1902, 5 | Mac Suibhne, Peadar | Monograph or Collective Volume | Leinster Leader | 1977 |
| Peter Walsh and the remonstrance | Mulrean, B. | Article in Journal | | 1946 |
| Pieces of Irish history, illustrative of the condition of the Catholics of Ireland, of the origin and progress of the political system of the United Irishmen; and of their transactions with the Anglo-Irish government | MacNeven, W. J. | Monograph or Collective Volume | | 1807 |
| Policy on the run : Henry II and Irish Sea diplomacy | Hays, L.Jones, E. D. | Article in Journal | | 1990 |
| Political problems 1860-78 | Corish, Patrick J. | Monograph or Collective Volume | Gill | 1967 |
| Political problems, 1850-60 | Whyte, J. H. | Monograph or Collective Volume | Gill | 1967 |
| Popular politicization, Defenderism and the Catholic question | Smyth, Jim | Article in Book | | 1990 |
| Presbyterian-Roman Catholic relations in Ireland (1780-1975) | Barkley, John M. | Article in Journal | | 1981 |
| Priests and people in pre-famine Ireland | Connolly, Sean J. | Monograph or Collective Volume | | 1981 |
| Primary education | Murphy, Ignatius | Article in Book | | 1968 |
| Primate Lombard and James I | Silke, John J. | Article in Journal | | 1955 |
| Problems common to both protestant and catholic churches in eighteenth-century Ireland | Johnston, E. M. | Article in Book | | 1983 |
| Proclamation against Patrick MacCowan, priest, 16 July 1583 | | Article in Journal | | 1983 |
| Recusancy and the Dublin Stanyhursts | Lennon, Colm | Article in Journal | | 1975 |
| Religion and land tenure in eighteenth-century Ireland : tenancy in the south-east | Gahan, Daniel | Article in Book | | 1990 |
| Religion in Victorian Britain, 1 : traditions; 2 : controversies; 3 : sources; 4 : interpretations. 4 vols. | | Monograph or Collective Volume | | 1988 |
| Religious toleration and the relaxation of the penal laws : an imperial perspective, 1763-1780 | Hill, Jacqueline R. | Article in Journal | | 1989 |
| Revolution and Catholicism in Ireland, 1848-1922 | Newsinger, John | Article in Journal | | 1979 |
| Richard Talbot, earl of Tyrconnell (1630-91) and the Catholic counter-revolution | McGuire, James | Article in Book | | 1989 |
| Sarsfield's defence of the Shannon 1690-91 | Mangan, Henry | Article in Journal | | 1949 |
| Secondary education | Ó Súillebháin, S. V. | Article in Book | | 1971 |
| Secondary education in Ireland : 1870-1921 | McElligott, T. J. | Monograph or Collective Volume | Irish Academic Press | 1981 |
| Seventeenth-century interpretations of the past : the case of Geoffrey Keating | Cunningham, Bernadette | Article in Journal | | 1986 |
| Some unpublished letters of Mateo de Oviedo, archbishop of Dublin | | Article in Journal | | 1955 |
| Sources for the history of the Irish College, Rome | Hanley, John | Article in Journal | | 1964 |
| South Africa | Doyle, F. B. | Monograph or Collective Volume | Gill | 1971 |
| South America | Canning, A. M. | Monograph or Collective Volume | Gill | 1971 |
| St Anthony's College of the Irish Franciscans, Louvain : 1927-1977, 1607-1977 | Conlan, Patrick, 1940- | Monograph or Collective Volume | | 1977 |
| Survival and reorganisation, 1650-95 | Millett, Benignus | Monograph or Collective Volume | Gill | 1968 |
| The aims and achievements of Lord Grenville | Jupp, Peter, 1940-2006 | Article in Book | | 1976 |
| The Anglican world : problems of coexistence during the pontificates of Urban VIII and Innocent X (1623-1655) | Conway, Dominic | Article in Book | | 1972 |
| The appointment of blessed Oliver Plunket to Armagh | Ó Fiaich, Tomás | Article in Journal | | 1958 |
| The archives of St. Isidore's College, Rome | Millett, Benignus | Article in Journal | | 1985 |
| The archives of the archdiocese of Dublin | Sheehy, David C. | Article in Journal | | 1989 |
| The archives of the Missionary Sisters of the Holy Rosary | Richardson, Cora | Article in Journal | | 1991 |
| The arrest of Oliver Plunkett | Brady, John, d.1963 | Article in Journal | | 1954 |
| The Catholic Church and the Irish temperance movement, 1838-1901 | Malcolm, Elizabeth | Article in Journal | | 1982 |
| The Catholic Church in nineteenth-century Ireland : a sociological study | Keenan, D. J. | Monograph or Collective Volume | Gill & Macmillan | 1983 |
| The Catholic community in eighteenth-century county Wexford | Whelan, Kevin | Article in Book | | 1990 |
| The catholic community in the nineteenth century | Corish, Patrick J. | Article in Journal | | 1983 |
| The catholic community in the seventeenth and eighteenth centuries | Corish, Patrick J. | Monograph or Collective Volume | Helicon | 1981 |
| The Catholic Convention and Anglo-Irish politics, 1791-3 | O'Flaherty, E. | Article in Journal | | 1985 |
| The Catholic question, 1801-1812 | Connolly, Sean J. | Article in Book | | 1989 |
| The Church of Ireland : a history | Milne, Kenneth | Monograph or Collective Volume | A.P.C.K. | 1966 |
| 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 since emancipation : Ecclesiastical learning | Corkery, John | Monograph or Collective Volume | Gill & Macmillan | 1970 |
| The Church since emancipation : Epilogue : Modern Ireland | McKevitt, Peter | Monograph or Collective Volume | Gill & Macmillan | 1970 |
| The church under the penal code | Brady, John, d.1963Corish, Patrick J. | Monograph or Collective Volume | Gill | 1971 |
| The continuity of the Gaelic tradition in eighteenth-century Ireland | Bromwich, R. S. | Article in Journal | | 1947 |
| The contribution of Irish Franciscans on the Continent in the seventeenth century | Giblin, Cathaldus | Article in Book | | 1981 |
| The Correspondence of Edmund Burke, 1 : April 1774 to June 1768; 2 : July 1768 to June 1774; 3 : July 1774 to June 1778; 4 : July 1778 to June 1782; 5 : July 1782 to June 1789; 6 : July 1789 to Dec. 1791; 7 : Jan. 1792 to Aug. 1794; 8 : Sept. 1794 to Apr. 1796; 9 : May 1796 to July 1797; 10 : Index volume. 10 vols. | | Monograph or Collective Volume | | 1958 |
| The Counter-Reformation | Jones, F. M. | Monograph or Collective Volume | Gill | 1967 |
| The counter-reformation and the people of catholic Ireland, 1596-1641 | Bossy, John | Article in Book | | 1971 |
| The diocese of Killaloe in the eighteenth century | Murphy, Ignatius | Monograph or Collective Volume | | 1991 |
| The Diocese of Killaloe, 1800-1850 | Murphy, Ignatius | Monograph or Collective Volume | | 1992 |
| The diocese of Raphoe, 1773-1805 : documents illustrating the history of the diocese from the 'Congressi' volumes in the archives of the 'Propaganda Fide', Rome | | Monograph or Collective Volume | | 1980 |
| The educational ideas of Paul Cardinal Cullen | Hayes, C. | Article in Journal | | 1980 |
| The exclusion of Catholics from the legal profession in Ireland, 1537-1829 | Kenny, Colum | Article in Journal | | 1987 |
| The famine and the development of the Church in Scotland | Handley, J. E. | Article in Journal | | 1947 |
| The first duke : an introduction to the Charles II-charter | Irwin, Liam | Article in Journal | | 1977 |
| The general election of 1892 : the Catholic clergy and the defeat of the Parnellites | Woods, C. J. (Christopher John) | Article in Book | | 1980 |
| The Graces, 1625-41 | Clarke, Aidan | Monograph or Collective Volume | | 1968 |
| The hereditary bondsman : Daniel O'Connell 1775-1829 | MacDonagh, Oliver | Monograph or Collective Volume | Weidenfeld and Nicolson | 1988 |
| The historian and the archivist | McCartney, Donal | Article in Journal | | 1989 |
| The historical writings of Patrick J. Corish to 1989 | | Article in Book | | 1990 |
| 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 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 Holy See and Ireland, 1780-1802 | O'Donoghue, P. | Article in Journal | | 1976 |
| The Holy See and the Irish movement for the repeal of the union with England, 1829-47 | Broderick, J. F. | Monograph or Collective Volume | Universitas Gregoriana | 1951 |
| The Irish Catholic experience : a historical survey | Corish, Patrick J. | Monograph or Collective Volume | Gill & Macmillan | 1985 |
| The Irish church in the sixteenth century | Mooney, Canice | Article in Journal | | 1963 |
| The Irish clergyman | McAvoy, T. T. | Article in Book | | 1970 |
| The Irish college at Salamanca | Henchy, Monica | Article in Journal | | 1981 |
| The Irish colleges on the continent | Giblin, Cathaldus | Article in Book | | 1978 |
| The Irish colleges on the continent : Their origin and history | O'Boyle, James | Monograph or Collective Volume | | 1935 |
| The Irish community in Greenock in the 19th century | Lobban, R. D. | Article in Journal | | 1971 |
| The Irish continental college movement : the colleges at Bordeaux, Toulouse and Lille | Walsh, T. J. (Timothy J.) | Monograph or Collective Volume | Golden Eagle Books | 1973 |
| The Irish dimension of the British Kulturkampf : Vaticanism and civil allegiance, 1870-1875 | Jenkins, H. | Article in Journal | | 1979 |
| The Irish in Britain | O'Connor, Kevin | Monograph or Collective Volume | Sidgwick & Jackson | 1972 |
| The Irish in modern Scotland | Handley, J. E. | Monograph or Collective Volume | University P. | 1947 |
| The Irish layman | Brown, T. N. | Article in Book | | 1970 |
| The Irish Missionary Movement : A historical survey 1830-1980 | Hogan, Edmund M. | Monograph or Collective Volume | | 1990 |
| The Irish priests in the penal times (1660-1760) | Burke, William P. | Monograph or Collective Volume | | 1914 |
| The Jesuits and the 1937 constitution | Keogh, Dermot | Article in Journal | | 1989 |
| The Knights of Saint Columbanus | Bolster, Evelyn | Monograph or Collective Volume | | 1979 |
| The last speech of Blessed Oliver Plunket | | Article in Journal | | 1947 |
| The later pilgrimage - Irish poetry on Lough Derg | Ní Chatháin, Próinséas | Article in Book | | 1988 |
| The letters of Charles O'Conor of Belanagare. 2 vols. | Ward, C. C.Ward, R. E. | Monograph or Collective Volume | | 1980 |
| The letters of Luke Wadding | Mooney, Canice | Article in Journal | | 1957 |
| The letters of Saint Oliver Plunkett, 1625-1681 : Archbishop of Armagh and Primate of all Ireland | | Monograph or Collective Volume | | 1979 |
| The letters of Saint Oliver Plunkett, 1625-1681, Archbishop of Armagh and Primate of All Ireland | | Monograph or Collective Volume | | 1979 |
| The Levellers and the conquest of Ireland in 1649 | Carlin, Norah | Article in Journal | | 1987 |
| The library of the Augustinians of Galway in 1731 | | Article in Journal | | 1990 |
| The missions : Africa and the Orient | McGlade, Joseph | Monograph or Collective Volume | Gill | 1967 |
| The opening of the Vatican archives (1880-1881) and Irish historical research | Walsh, K. | Article in Journal | | 1981 |
| The ordeal of O'Conor of Belanagare | Ward, C. C.Ward, R. E. | Article in Journal | | 1979 |
| The origins of Catholic nationalism | Corish, Patrick J. | Monograph or Collective Volume | Gill | 1968 |
| The patterns of Kilmakilloge | Lyne, G. J. | Article in Journal | | 1989 |
| The penal laws | Connolly, Sean J. | Article in Book | | 1990 |
| The Phoenix conspiracy (contd.) | Ó Broin, León, 1902-1990 | Article in Journal | | 1980 |
| The politicization of the Irish Catholic bishops, 1800-1850 | MacDonagh, Oliver | Article in Journal | | 1975 |
| The pope, the Protestants, and the Irish : papal aggression and anti-Catholicism in mid nineteenth-century England | Klaus, R. J. | Monograph or Collective Volume | | 1987 |
| The practice of religious controversy in Dublin, 1600-1641 | Gaffney, Declan | Article in Book | | 1989 |
| The protestant crusade in Ireland, 1800-70 : a study of protestant-catholic relations between the Act of Union and Disestablishment | Bowen, Desmond | Monograph or Collective Volume | Gill & Macmillan | 1978 |
| The recusancy revolt of 1603 : a reinterpretation | Sheehan, A. J. (Anthony J.) | Article in Journal | | 1983 |
| The Regional Impact of Irish Catholicism 1700-1850 | Whelan, Kevin | Article in Book | | 1988 |
| The Religious Factor in the 1798 Rebellion in Wexford | Whelan, Kevin | Article in Book | | 1987 |
| The rise of recusancy among the Dublin patricians, 1580-1613 | Lennon, Colm | Article in Book | | 1989 |
| The Role of the Catholic Priest in the 1798 Rebellion in County Wexford | Whelan, Kevin | Article in Book | | 1987 |
| The Roman Catholic Church and the Nineteenth Century Irish Diaspora | Gilley, Sheridan | Article in Journal | | 1984 |
| The Roman Catholic Church and the Plan of Campaign in Ireland, 1886-1888 | Larkin, Emmet | Monograph or Collective Volume | Cork University Press | 1978 |
| The Roman Catholic Church in Ireland 1800-1922 : A survey of recent historiography | Silke, John J. | Article in Journal | | 1975 |
| The siege of Derry | Macrory, Patrick | Monograph or Collective Volume | | 1988 |
| The social and cultural background of a Counter-Reformation episcopate 1618-60 | Cregan, Donal F. | Article in Book | | 1979 |
| The Thoresby Miscellany, 16 | Anonymous | Monograph or Collective Volume | | 1974 |
| The three lives of Gavan Duffy | Pearl, C. | Monograph or Collective Volume | O'Brien Press|New South Wales University Press | 1979 |
| The Treaty of Limerick | Simms, J. G. (John Gerald) | Monograph or Collective Volume | Dundalgan Press | 1961 |
| The trial of Oliver Plunkett | Curtayne, Alice | Monograph or Collective Volume | Sheed & Ward | 1953 |
| The trial of Oliver Plunkett | Curtayne, Alice | Article in Journal | | 1954 |
| The tribes at Louvain : Francis Martin, S.T.D. | Spelman, J. P. | Article in Journal | | 1886 |
| The Tridentine evolution of modern Irish Catholicism, 1563-1962 : a re-examination of the "devotional revolution" thesis | McGrath, T. G. | Article in Journal | | 1991 |
| The University question | McGrath, Fergal | Article in Book | | 1968 |
| The Wexford Catholic community in the later seventeenth century | Murphy, Celestine | Article in Book | | 1990 |
| The Writings and Speeches of Edmund Burke, 9, pt. 1 : The Revolutionary War, 1794-1797; 9, pt. 2 : Ireland | Burke, Edmund, 1729-1797McDowell, R. B. (Robert Brendan), 1913-2011 | Monograph or Collective Volume | | 1991 |
| The writings of Father Luke Wadding, O.F.M. | Mooney, Canice | Article in Journal | | 1958 |
| Three unpublished Cistercian documents | [Ó Conbhuí], Colmcille | Article in Journal | | 1955 |
| To the greater glory : a history of the Irish Jesuits | McRedmond, Louis | Monograph or Collective Volume | | 1991 |
| Two centuries of Catholicism in County Wexford | Corish, Patrick J. | Article in Book | | 1987 |
| Under the Union flag : the Catholic Church in Ireland, 1800-1870 | Kerr, Donal A. | Article in Book | | 1989 |
| Une diocèse de l'Église établie d'Irlande à l'époque georgienne, d'après une visite épiscopale : Ossory | Loupès, P. | Article in Journal | | 1983 |
| Urban Catholics : urban Catholicism in England and Wales from 1829 to the present day | Hickey, John | Monograph or Collective Volume | | 1967 |
| Urban Minorities and Majorities : Catholics and Protestants in Towns c.1659-1850 | O'Flanagan, P. | Article in Book | | 1988 |
| Ussher as a churchman | Sykes, Norman | Article in Journal | | 1956 |
| Viceregal vignettes : Lords lieutenant of Ireland under William Pitt, the Younger, 1784-1801 | Schweitzer, D. R. | Article in Journal | | 1986 |
| Vicissitudes of an Irish Catholic family under Henry VIII and Elizabeth | Ronan, Myles V. (Myles Vincent) | Article in Journal | | 1953 |
| William Bathe, S.J., recusant scholar, 1564-1614 : 'weary of the heresy' | Ó Mathúna, S. P. | Article in Journal | | 1988 |
| William Molyneux, a herald of democracy | Chillingworth, H. R. | Article in Journal | | 1946 |
| William Monsell and Papal Infallibility : the workings of an inopportunist's mind | Roantree, Dermot | Article in Journal | | 1988 |
| Women and religious practice | Corish, Patrick J. | Article in Book | | 1991 |
| Women and the Reformation in seventeenth-century Ireland | Kilroy, Phil | Article in Book | | 1991 |