- CNJC : Nelson J. Callahan: Manuscripts
- CNJC 1/ Series : Nelson J. Callahan - Education
- CNJC 1/01 Folder : Nelson J. Callahan School Schedules - PHIL and THEO 1947-1953
- CNJC 1/02 Folder : Nelson J. Callahan - 1 PHIL 1948-1949?
- CNJC 1/03 Folder : Nelson J. Callahan Philosophy Compositions 1948
- CNJC 1/04 Folder : Catholic Action Notes / William A. Bachmann, S.T.D? 1949
- CNJC 1/05 Folder : Supplementary Moral Theology Notes: De Praeceptis Decalogi and De Praeceptis Ecclesiae / William A. Bachmann, S.T.D? 1949
- CNJC 1/06 Folder : Nelson J. Callahan - School Papers and Work 1949-1952
- CNJC 1/07 Folder : Nelson J. Callahan - Schooling - Special Assignments 1949-1952?
- CNJC 1/08 Folder : Patrology: 2 Semester 1950
- CNJC 1/09 Folder : Nelson J. Callahan Catechists and Administration 1951-1952
- CNJC 1/10 Folder : Supplementary Moral Theology Notes: De Sacramentis In Genere and De Poenitentia / William A. Bachmann? 1952
- CNJC 2-13/ Series : Nelson J. Callahan - Research
- CNJC 2-10/ Subseries : Research Material on the Diocese of Cleveland
- CNJC 2-4/ subseries : Research concerning Eugene O'Callaghan
- CNJC 2/01 Folder : Letters Concerning O'Callaghan, List of Cleveland Ordained 1848-1889, Rappe's Letter to Spalding 1870 and Critique 1848-1889
- CNJC 2/02 Folder : Eugene O'Callaghan Correspondence - Primary Collection (1 of 2) 1859-1901
- CNJC 2/03 Folder : Eugene O'Callaghan Correspondence - Primary Collection (2 of 2) 1859-1901
- CNJC 2/04 Folder : Nelson J. Callahan - Correspondence and Documents Concerning O'Callaghan's Jus Letters and Catholic Response to them 1866-1968
- CNJC 2/05 Folder : Copies of Jus Letters / by Eugene O'Callaghan 1868-1869
- CNJC 2/06 Folder : Eugene O'Callaghan - Correspondence (Notre Dame) 1868-1901
- CNJC 2/07 Folder : Letters from UND Archives 1869-1871
Responses to McMaster by Priests on Jus, Letters on O'Callaghan to Purcell, Letters of Bishop Spalding
- CNJC 3/01 Folder : Jus Letters and Correspondence / by Eugene O'Callaghan 1869-1870
- CNJC 3/02 Folder : Eugene O'Callaghan Duplicate Letters 1869-1898
- CNJC 3/03 Folder : Correspondence - Eugene O'Callaghan - Hanin, Spalding, Purcell 1871-1875
- CNJC 3/04 Folder : Documents Concerning Priesthood in United States 1893-
- CNJC 3/05 Folder : Eugene O'Callaghan's Death 1900-1901
- CNJC 3/06 Folder : In Re Estate of Eugene O'Callaghan 1901-1910
- CNJC 4/01 Folder : Eugene O'Callaghan - Toledo Relatives 1902
- CNJC 4/02 Folder : Slides on O'Callaghan, Records of Catholic Historical Society of Philadelphia, Pamphlets and Letters of Nelson J. Callahan 1972-2012
- CNJC 4/03 Folder : Correspondence between Nelson Callahan and Kevin E. McKenna 2005-2011
- CNJC 4-10/ subseries : Research concerning the History of the Diocese of Cleveland
- CNJC 4/04 Folder : B.S.A. Sisters vs. Bishop Gilmour / by Dr. Paul Quigley
- CNJC 4/05 Folder : S. Bauer Correspondence (Houck) 1840-1913
Rappe Letters, Freeman's Journal, Gilmour Corresp - Diary (1 of 2) / S. Bauer, Bishop Rappe, Bishop Gilmour
- CNJC 4/06 Folder : S. Bauer Correspondence (Houck) 1840-1913
Rappe Letters, Freeman's Journal, Gilmour Corresp - Diary (2 of 2) / S. Bauer, Bishop Rappe, Bishop Gilmour
- CNJC 4/07 Folder : Diary of Daniel Shehan 1841-1846
Typewritten transcriptions of portions of letters
- CNJC 4/08 Folder : Rappe Letters (Latin) from our archives 1845-1869;1949,1969
Fr. Saint Pere, A.L. Card. Barnabo
- CNJC 4/09 Folder : Rappe and Bauer Letters from Baltimore Archives 1848-1871
- CNJC 5/01 Folder : Cathedral Plastering Contract 1852
- CNJC 5/02 Folder : Correspondence: Bauer - Houck; Newspaper Articles (Copies): Rappe Resignation 1854-1901
- CNJC 5/03 Folder : Theological Debating Society - Cleveland "12 Apostles" - Minutes of Meetings 1862-1875
- CNJC 6/01 Folder : Records on Charity Hospital / Clifford Stamelane, CSA 1863-1898
- CNJC 6/02 Folder : Propaganga Fide - Diocese of Cleveland and Notes / Translations (1 of 5) 1869-1898
- CNJC 6/03 Folder : Propaganda Fide - Diocese of Cleveland and Notes / Translations (2 of 5) 1870
List of Cleveland Ordained; Rappe's letter to Spalding
- CNJC 6/04 Folder : Propaganda Fide - Diocese of Cleveland and Notes / Translations (3 of 5)
- CNJC 6/05 Folder : Propaganda Fide - Diocese of Cleveland (4 of 5)
- CNJC 6/06 Folder : Propaganda Fide - Diocese of Cleveland (5 of 5)
- CNJC 7/01 Folder : Rappe Resignation - Public Commentary 1870-1877
- CNJC 7/02 Folder : Letters of S. Bauer - Rappe History, Letters of Rappe found in Vermont 1871-1878
- CNJC 7/03 Folder : Letters of Gilmour to Abbot B. Smith; S. Bauer on Rappe History; Rappe Letter Found in Burlington, VT 1871-1901
- CNJC 7/04 Folder : NJC Diocesan Correspondence; Kolasewsky Letter (1 of 2) 1874-1906
- CNJC 7/05 Folder : NJC Diocesan Correspondence; Kolasewsky Letter (2 of 2) 1874-1906
- CNJC 7/06 Folder : Vatican Archives - Schrembs - Mooney - Propaganda - Rappe 1874-1927
- CNJC 7/07 Folder : Ancient Order of Hibernians (Archives, Diocese of Cleveland) 1879-1897
- CNJC 7/08 Folder : Gilmour - CSA Correspondence 1880-1891
- CNJC 8/01 Folder : Diocese of Cleveland Archival Material: Gilmour Diary, Acta (1 of 3) 1886-1897
- CNJC 8/02 Folder : Diocese of Cleveland Archival Material: Gilmour Diary, Acta (2 of 3) 1897-1898
- CNJC 8/03 Folder : Diocese of Cleveland Archival Material: Gilmour Diary, Acta (3 of 3)
- CNJC 9/01 Folder : Bishop Richard Gilmour Diary (1 of 6) 1886-1887
- CNJC 9/02 Folder : Bishop Richard Gilmour Diary (2 of 6) 1886-1887
- CNJC 9/03 Folder : Bishop Richard Gilmour Diary (3 of 6) 1886
- CNJC 9/04 Folder : Bishop Richard Gilmour Diary (4 of 6) 1886
- CNJC 10/01 Folder : Bishop Richard Gilmour Diary (5 of 6) 1887-1891
- CNJC 10/02 Folder : Bishop Richard Gilmour Diary (6 of 6) 1888-1889
- CNJC 10/03 Folder : Miscellaneous Papers of Cleveland 1888
- CNJC 10/04 Folder : Cleveland Diocese Documents 1891-1963
George F. Houck, W.A. Scullen, Father Mahon, Jacob F. Knebler, Bishop Horstmann
- CNJC 10/05 Folder : Archbishop John Ireland on Citizenship to Cleveland 1899/05
- CNJC 10/06 Folder : Statutes and Regulation of the Diocese of Cleveland / Riccardo [Richard] Gilmour, Ed. 1949
- CNJC 10/07 Folder : St. John College of Cleveland Papers 1959-1961
- CNJC 10/08 Folder : John Francis Dearden 1969-1988
- CNJC 10-11/ Subseries : Research Material on the Archdiocese of New York
- CNJC 10/09 Folder : Archbishop Conroy's Report to Propaganda on U.S. Church 1878 1878
- CNJC 11/01 Folder : Copy of Bishop [Mc?]Quaid's Letter of 1882, Copy of Archbishop Carr's Diary 1899, and Miscellaneous / Bishop [Mc?]Quaid, Archbishop Carr 1882-1899
- CNJC 11/02 Folder : Burtsell and McGlynn Papers From Al Issacson and Jeff Shonenberg 1983
- CNJC 11/03 Folder : Papers Concerning Burtsell's Life and Diary 1985-1986
- CNJC 11/04 Folder : Jeff Shonenberg Thesis on McGlynn, Al Issacson Research 1988-1991
- CNJC 12-13/ Series : Nelson J. Callahan - Publications
- CNJC 12/01 Folder : A Case for Due Process in the Church / Nelson J. Callahan
- CNJC 12/02 Folder : Preparation Materials - A Case for Due Process (1 of 2)
- CNJC 12/03 Folder : Preparation Materials - A Case for Due Process (2 of 2)
- CNJC 12/04 Folder : WC - Correspondence - Book - Due Process / Nelson J. Callahan 1969-1972
- CNJC 12/05 Folder : Correspondence Concerning Callahan's Book 1969-1972
Nelson J. Callahan, Jordan A. Aumann, Kneally Debevec, Brother Spalding, Bishop Malone, Archbishop Alter, Bishop McManus, Adam Maider, Andrew Greeley, John O'Malley, Yzermans, Trisco
- CNJC 12/06 Folder : Duquesne Irish History Forum 1974/10
- CNJC 13/01 Folder : The Irish / by N. J. Callahan 1977-
- CNJC 13/02 Folder : Callahan / Hickey Irish Americans / Communities Manuscript (1 of 2) 1979
- CNJC 13/03 Folder : Callahan / Hickey Irish Americans / Communities Manuscript (2 of 2) 1979
- CNJC 13/04 Folder : Cleveland Encyclopedia Material and Article on Irish 1984-1985
- CNJC 13/05 Folder : Father Callahan 1993-1997
- CNJC 13/06 Folder : Miscellaneous 1902-1973
- CNJC 14-15/ Series : Nelson J. Callahan - Activities
- CNJC 14/01 Folder : Talk: Fullness of Christ - at St. Ed Vocation Day / Nelson J. Callahan 1957
- CNJC 14/02 Folder : God: Our Beginning and our End - Class Materials and Tests / Theodore M. Hesburgh 1960
- CNJC 14/03 Folder : Speeches and Writings of John Tracy Ellis 1962-1973
- CNJC 14/04 Folder : North American Theological Study Group (1 of 3) 1963-1985
- CNJC 14/05 Folder : North American Theological Study Group (2 of 3) 1963-1984
- CNJC 14/06 Folder : North American Theological Study Group (3 of 3) 1982-1985
- CNJC 15/01 Folder : Clergy Businessmen Dialog - Cleveland (1 of 2) 1980-
- CNJC 15/02 Folder : Clergy Businessmen Dialog - Cleveland (2 of 2) 1980-
- CNJC 15/03 Folder : Nelson J. Callahan - Personal Correspondence 1995-1998