Former Owner
- Brayton C. Ives2
- Bruce Bannerman1
- Budapest University of Jewish Studies1
- Burndy Library3
- Buxheim Charterhouse1
- Camillo Riccio1
- Carleton Rubira Richmond1
- Carlo Archinto, 2nd Marquess of Parona, 3rd Count of Trainate1
- Carlo Francesco Frasconi1
- Carlo Morbio1
- Catharine Wisser1
- Cecil H. Clough1
- Champmol1
- Charles Brodrick1
- Charles Burr1
- Charles Butler3
- Charles D. Humberd1
- Charles Eliot Norton1
- Charles F. Gunther2
- Charles Hurleston1