Former Owner
- Cambrai Cathedral1
- Cambron Abbey1
- Camillo Riccio1
- Carl Hermann Grabauer1
- Carleton Rubira Richmond1
- Carlo Bonaparte1
- Carlo Francesco Frasconi1
- Carlo Longland1
- Carlos José Gutiérrez de los Ríos y Rohan Chabot Fernán-Núñez1
- Carthusians of Treviso1
- Casey Albert Wood1
- Castel-Lodève family1
- Catharine Wisser1
- Catherina van Drenckwaert1
- Catherine Barton1
- Catherine de' Medici1
- Cati S Thomas1
- Caxton Club1
- Cecil Brent1
- Cecil Deedes1