Former Owner
- Catherine Conduitt1
- Catherine de' Medici1
- Cati S Thomas1
- Cecil Deedes1
- Cecil Dunn Gardner1
- Cecil Mallaby Firth1
- Certosa di Farneta, Province of Lucca2
- Chacère Family1
- Champmol1
- Charles Alexander de Cosson1
- Charles Archibald Stonehill1
- Charles B. Hoyt1
- Charles Brodrick1
- Charles Burr1
- Charles Butler3
- Charles Carmichael Lacaita2
- Charles Chardin1
- Charles Coffin Little1
- Charles D. Humberd5
- Charles Deane1