Former Owner
- Caesareum Societatis Jesu Collegium Viennense1
- Cambrai Cathedral1
- Cambron Abbey1
- Carl Hermann Grabauer1
- Carlo Archinto, 2nd Marquess of Parona, 3rd Count of Trainate2
- Carlo Francesco Frasconi1
- Carlo Morbio2
- Carlton Lake2
- Caspar René Gregory2
- Castel-Lodève family1
- Castelluci1
- Catherina van Drenckwaert1
- Catherine de' Medici1
- Cati S Thomas1
- Caxton Club1
- Cecil Dunn Gardner1
- Cecil Mallaby Firth1
- Certosa di Farneta, Province of Lucca2
- Chacère Family1
- Champmol1