Former Owner
- 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
- Charles Alexander de Cosson1
- Charles Allen Munn1
- Charles Archibald Stonehill1
- Charles Augustus Stoddard1
- Charles B. Hoyt1
- Charles Brodrick1