Former Owner
- Camillo Riccio1
- Carleton Rubira Richmond1
- Carlo Francesco Frasconi1
- Caspar René Gregory1
- Castel-Lodève family1
- Castelluci1
- Catharine Wisser1
- Catherine de' Medici1
- Cecil Deedes1
- Cecil Dunn Gardner1
- Cecil H. Clough1
- Cecil Mallaby Firth1
- Chacère Family1
- Champmol1
- Chapelle du monastère du Carmel de Nantes1
- Charles Alexander de Cosson1
- Charles Archibald Stonehill1
- Charles B. Hoyt1
- Charles Brodrick1
- Charles Bruce, 3rd Earl of Ailesbury1