- CDPA : Diocese of Pittsburgh: Manuscripts
- CDPA /1 Folder : Letters
- CDPA /1.01 Letter : Bishop Shanahan to Bishop Tuigg 1883/0226
- CDPA /1.02 Letter : Bishop Shanahan to Bishop Tuigg 1883/0904
- CDPA /1.03 Letter : Bishop Shanahan to Bishop Tuigg 1884/0626
- CDPA /1.04 Letter : Michael O'Connor to J. Burn 1865/0106
- CDPA /1.05 Letter : "Lebreton" to Joseph Martin 1839/0218
- CDPA /1.06 Photo : Bishop Domenec [removed]
- CDPA /1.07 Letter : Bishop Domenec to Dear Sir
- CDPA /1.08 Letter : Circular From Bishop Domemec
- CDPA /1.09 Summons : For Alleghany County, Commonwealth of Pennsylvania 1837/1208
- CDPA /1.10 Letter : Sister M. Joseph to "Very Rev. Dear Father" 1873/0211
- CDPA /1.11 Letter : J.P. Barr to Richard H. Clarke 1872/1113
- CDPA /1.12 Letter : From Michael O'Connor 1856/0601
- CDPA /1.13 Letter : Bishop Domenec to "Rev. Dear Father" 1872/0512
- CDPA /1.14 Letter : Bishop Domenec to "Rev. Dear Father" 1877/0417
- CDPA /1.15 Letter : Michael O'Connor to O. Keany appointing Rev. R. Phelan to St. Mary's
- CDPA /2 Folder : Miscellaneous
- CDPA /2.01 Document : Three pages of the Biography of Father Michael O'Connor
- CDPA /2.02 Clipping : A Card of Thanks for Mother Mary Agnes, O.S.F.
- CDPA /2.03 Clipping : Gifts to the Catholic Historical Society
- CDPA /2.04 Clipping : Religious Intelligence
- CDPA /2.05 Clipping : Letter from Bishop Michael O'Connor to Diocese 1849/0106
- CDPA /2.06 Newspaper : The Oil City Derrick 1898/0601
- CDPA /2.07 Booklet : The Catholic and Protestant Versions of the Bible
- CDPA /2.08 Clipping : Appointments of Bishops 1876/0129
- CDPA /2.09 Clipping : Bishop Tuigg adresses mob of striking Molly Maguires, debate over their position within the Catholic Church 1877/0901
- CDPA /2.10 Clipping : Pastoral Letter of Rt. Rev. Bishop Tuigg 1878/0601
- CDPA /2.11 Clipping : Page from Pittsburgh Catholic 1844/0629
- CDPA /2.12 Clipping : Page with Letters from Bishop Tuigg 1879/0308
- CDPA /2.13 Document : Page from Pittsburgh Catholic 1844/0504
- CDPA /2.14 Article : "Gallitzin" from Illustrated Catholic Family Almanac
- CDPA /2.15 Program : Reception in Honor of the Golden Jubilee of Bishop Phelan of Pittsburgh 1904/0504
- CDPA /2.16 Clipping : Page with Letters from Bishop Tuigg 1879/0308
- CDPA /2.17 Bulletin : The Catholic University Bulletin 1944/05
- CDPA /2.18 Invitation : Solemn Pontifical Opening Mass for King's College 1946
- CDPA /2.19 Clipping : Work of Bishop Domenec in Pittsburgh and Alegheny City
- CDPA /2.20 Clipping : Ecclesiastical Compositions in Pittsburgh
- CDPA /2.21 Clipping : An Imposing Religious Ceremony
- CDPA /2.22 Clipping : Death of Rt. Rev. Dr. Michael O'Connor
- CDPA /2.23 Clipping : The Funeral Obsequies of Bishop Michael O'Connor
- CDPA /2.24 Clipping : Death of Bishop Michael O'Connor
- CDPA /2.25 Clipping : Death of Rt. Rev. Michael O'Connor, S.J.
- CDPA /2.26 Clipping : Father Michael O'Connor, S.J.
- CDPA /2.27 Clipping : Death of Bishop Domenec
- CDPA /2.28 Clipping : Circular Letter of the Bishop of Pittsburgh
- CDPA /2.29 Clipping : Bishop Domenec's Will
- CDPA /2.30 Clipping : Mission to the Colored People
- CDPA /2.31 Clipping : The Late Bishop O'Connor
- CDPA /2.32 Clipping : St. Vincent de Paul Society
- CDPA /2.33 Clipping : Rt. Rev. Michael O'Connor, D.D. - Obituary
- CDPA /2.34 Newspaper : The Pittsburgh Catholic 1943/0805
- CDPA /2.35 Document : Group of Business and Letter Records and Photostats