Former Owner
- Carlo Archinto, 2nd Marquess of Parona, 3rd Count of Trainate3
- Carlo Bonaparte1
- Carlo Francesco Frasconi1
- Carlo Morbio1
- Cecil Deedes1
- Charles Alexander de Cosson1
- Charles Archibald Stonehill1
- Charles B. Hoyt1
- Charles Burr1
- Charles Butler2
- Charles D. Humberd2
- Charles Fairfax Murray3
- Charles Hoff3
- Charles Joseph Harford1
- Charles Stephen Ascherson3
- Charles William Dyson Perrins2
- Chiaravalle della Colomba Abbey1
- Christiania Kathedralskoles Bibliothek1
- Cini Johan de Barisani1
- Clarence Howard Clark, Sr.1