Former Owner
- Carlos José Gutiérrez de los Ríos y Rohan Chabot Fernán-Núñez1
- Carlton Lake2
- Caspar René Gregory2
- Castel-Lodève family1
- Castelluci1
- Catharine Wisser1
- Catherina van Drenckwaert1
- Catherine Barton1
- Catherine Conduitt3
- 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