Former Owner
- Charles Fairfax Murray1
- Charles Joseph Harford2
- Charles Lormier1
- Charles Stephen Ascherson2
- Charles Sumner4
- Charles William Dyson Perrins1
- Christian Brevoort Zabriskie1
- Christopher Cheney1
- Clarence Howard Clark, Sr.1
- Clarence S. Bement1
- Claude d'Urfé1
- Clement VII1
- Coella Lindsay Ricketts2
- Collegium Agennensis societatis Jesu (Agen, France)1
- Convent San Marco1
- Convento di San Giusto alle Mura1
- Convento di San Paolo1
- Cosimo de' Medici1
- Count Alexis de Golowkin1
- D. Manning1