Former Owner
- Charles Joseph Harford1
- Charles Sessler2
- Clarence Howard Clark, Sr.4
- Clarence S. Bement2
- Claude Le Muet1
- Clement XI1
- Clément de Renesse-Breidbach1
- Cologne Charterhouse1
- Conradus Eerens1
- Convento di San Giusto alle Mura1
- Convento di San Paolo1
- D. D. Horatius Bosner1
- Dana Hill1
- Darvīsh Asʻad ibn ʻAbd al-Karīm ʻArab1
- Davis & Harvey1
- Dominican Nunnery Holy Cross1
- Dropsie College for Hebrew and Cognate Learning4
- Duke C. Visconti di Modrone1
- E.F. Bonaventure1
- Eberhard von Kniestedt1