Former Owner
- C.J. Spence1
- Camillo Riccio1
- Carlo Archinto, 2nd Marquess of Parona, 3rd Count of Trainate1
- Carlo Francesco Frasconi1
- Carlo Morbio1
- Castelluci1
- Cecil H. Clough1
- Charles Butler1
- Charles Carmichael Lacaita1
- Charles Edward Harris-St. John1
- Charles F. Gunther1
- Charles Fairfax Murray1
- Charles Lormier1
- Charles Stephen Ascherson1
- Charles William Dyson Perrins1
- Christopher Cheney1
- Clarence Howard Clark, Sr.1
- Clarence S. Bement1
- Claude d'Urfé1
- Clement VII1