Former Owner
- Brunori Cadamosto1
- Burgersdijk & Niermans1
- Burndy Library2
- Bury St Edmunds Abbey3
- Buxheim Charterhouse10
- Byron Reed1
- C Traylen Bookshop1
- C. W. S. Dixon1
- C.J. Spence1
- Caesareum Societatis Jesu Collegium Viennense1
- Cambrai Cathedral1
- Camilla Doria Pallavicini1
- Carlo Archinto2
- Carlo Bonaparte1
- Carlo Morbio6
- Carthusian monastery, Herne1
- Caspar René Gregory1
- Castel-Lodève family1
- Castelluci1
- Catharine Wisser1