Former Owner
- Caesareum Societatis Jesu Collegium Viennense1
- Cambrai Cathedral1
- Cambron Abbey1
- Camilla Doria Pallavicini1
- Camillo Riccio1
- Carl Hermann Grabauer1
- Carleton Rubira Richmond1
- Carlo Archinto, 2nd Marquess of Parona, 3rd Count of Trainate4
- Carlo Bonaparte1
- Carlo Francesco Frasconi1
- Carlo Morbio6
- Caspar René Gregory1
- Castel-Lodève family1
- Castelluci1
- Catharine Wisser1
- Catherine Barton1
- Catherine Conduitt1
- Catherine de' Medici1
- Cati S Thomas1
- Caxton Club1