Former Owner
- Carlo Morbio6
- Carthusians of Treviso1
- Caspar René Gregory1
- Castel-Lodève family1
- Castelluci1
- Catharine Wisser1
- Catherine Barton1
- Catherine Conduitt1
- Catherine de' Medici1
- Cati S Thomas1
- Caxton Club1
- Cecil Brent1
- Cecil Deedes1
- Cecil Dunn Gardner1
- Cecil H. Clough1
- Cecil Mallaby Firth1
- Certosa di Farneta, Province of Lucca2
- Chacère Family1
- Champmol1
- Chapelle du monastère du Carmel de Nantes1