Whilst the Cardinal's own papers and books form the foundations of the collections several other noted collections are also housed in COFLA. Download an index to The Tomás Ó Fiaich Papers
The Roman Catholic Church records for the archdiocese of Armagh have been computerised and can be searched by proxy at COFLA. This is an indispensable source for the genealogist. To this has been added a range of other records both hard copy and computerised to provide a substantial family history service within the Library. In addition the papers of several nineteenth and twentieth century Archbishops and Cardinals are also kept. These contain a huge volume of material of important to the history of the Northern Ireland state and events, religious, social and political before and after the partition of Ireland.
Other major collections which will be of interest to the scholar of Irish history, particularly of the last half century will include the papers of Sister Sarah Clarke who worked extensively with Irish and other prisoners in Britain, those of Monsignor Denis Faul and Monsignor Raymond Murray on their human rights work during the 'Troubles' and those of the latter regarding local history and the Irish language.
The Archive also contains a substantial body of material relating to the growth and development of the Gaelic Athletic Association across Ulster. This is the largest sporting and cultural body on the island and again the collection reflects the association''s local, county, provincial and national significance.
The largest single collection in the archive is that containing the papers of Micheline Kerney Walsh (MKW papers). She was the daughter of the first Irish Ambassador to Spain and researched extensively the archive in Paris and Madrid as well as elsewhere in Europe during the twentieth century. Her collection of transcribed documents draw together a unique collection of material on Irish families from continental Europe from the sixteenth until the twentieth century. With more than 250,000 documents the collection represents a major source for the study of Ireland's place in Europe over the last four hundred years linking military service, religious calling and business.