Former Owner
- Cistercian Abbey of Beaupré1
- City College of New York1
- Clara von Vorssel1
- Clarence Lee Cline1
- Claude Augustin de Cosson1
- Claude Bourelier1
- Claude Joseph Constant Despine1
- Claude Le Muet1
- Claude Settlemire1
- Claude de Fonsèque1
- Clement Griscom1
- Clement VII1
- Clement XI1
- Clemente Carilli1
- Cloître de la Chartreuse du Val de Bénédiction1
- Clément de Renesse-Breidbach1
- Cobham, H. W., 1867-1
- Coggeshall Abbey1
- Collegium Germanicum et Hungaricum1
- Collège Saint-Clément1