Former Owner
- Christopher Tschudin1
- Clarence Howard Clark, Sr.1
- Claude d'Urfé1
- Clement VII1
- Clément de Renesse-Breidbach1
- Convento di San Giusto alle Mura1
- Cyrus Adler1
- Dame Margery Byrkenhed1
- Danii︠a︡l-sultan1
- 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
- Duprès, Marguerite1
- Earl of Chesterfield1
- Eberhard von Kniestedt1