Former Owner
- Cini Johan de Barisani1
- Cistercian Abbey of Beaupré1
- City College of New York1
- Clara von Vorssel1
- Clarence Howard Clark, Sr.2
- Clarence Lee Cline1
- Clarence S. Bement4
- Claude Augustin de Cosson1
- Claude Joseph Constant Despine1
- Claude Le Muet1
- Claude d'Urfé2
- Claude de Fonsèque1
- Clement Griscom1
- Clement VII1
- Clement XI1
- Clemente Carilli1
- Cloître de la Chartreuse du Val de Bénédiction1
- Clément de Renesse-Breidbach1
- Coella Lindsay Ricketts67
- Coggeshall Abbey1