Former Owner
- Birgittinessenklooster Mariënwater1
- C. Bruscoli1
- C.J. Spence1
- Carlo Morbio1
- Charles Edward Harris-St. John1
- Charles Fontaine1
- Charles Joseph Harford1
- Charles Porterfield Krauth1
- Charles Sessler1
- Charles William Dyson Perrins1
- Charles Étienne Brasseur de Bourbourg1
- Charles-Gilbert Morel de Vindé1
- Clarence Howard Clark, Sr.1
- Claude d'Urfé1
- Clement VII1
- Clément de Renesse-Breidbach1
- Convento di San Giusto alle Mura1
- Dame Margery Byrkenhed1
- Danii︠a︡l-sultan1
- Darvīsh Asʻad ibn ʻAbd al-Karīm ʻArab1