Former Owner
- Bernard Quaritch Ltd3
- Bertram Ashburnham, 4th Earl of Ashburnham2
- Bertram Dobell1
- Cambron Abbey1
- Carlo Archinto, 2nd Marquess of Parona, 3rd Count of Trainate1
- Charles Chardin1
- Charles Eliot Norton2
- Charles Hurleston1
- Charles Lenormand du Coudray1
- Charles Stephen Ascherson1
- Charles Stuart, 1st Baron Stuart de Rothesay1
- Château d'Anet1
- Coella Lindsay Ricketts4
- Collegium Agennensis societatis Jesu (Agen, France)2
- Cologne Charterhouse3
- Convent San Marco1
- Cosimo de' Medici1
- Craven Ord1
- Daniel B. Fearing2
- Edward Duff Balken1