Former Owner
- Charles Eliot Norton1
- Charles Fontaine1
- Charles Porterfield Krauth1
- Charles Sessler1
- Charles William Dyson Perrins1
- Charles Étienne Brasseur de Bourbourg1
- Charles-Gilbert Morel de Vindé1
- Clarence Howard Clark, Sr.1
- Clement VII1
- Clément de Renesse-Breidbach1
- Convento di San Giusto alle Mura1
- Dame Margery Byrkenhed1
- Darvīsh Asʻad ibn ʻAbd al-Karīm ʻArab1
- David Eugene Smith1
- David P. Wheatland1
- David Pulsifer1
- De Raude1
- Diego Clemencín1
- Diego de Arce y Reinoso1
- Dorothy Stahl Brady1