Former Owner
- C. W. S. Dixon1
- C.J. Spence1
- Caesareum Societatis Jesu Collegium Viennense1
- Cambrai Cathedral1
- Cambron Abbey1
- Camilla Doria Pallavicini1
- Carl Alphons Geigy-Hagenbach1
- Carleton Rubira Richmond1
- Carlo Bonaparte1
- Carlo Longland1
- Carlos José Gutiérrez de los Ríos y Rohan Chabot Fernán-Núñez1
- Castel-Lodève family1
- Castelluci1
- Catharine Wisser1
- Catherina van Drenckwaert1
- Catherine Barton1
- Catherine de' Medici1
- Cati S Thomas1
- Cecil Deedes1
- Cecil Dunn Gardner1