Former Owner
- Carlo Archinto, 2nd Marquess of Parona, 3rd Count of Trainate1
- Caxton Club1
- Cecil H. Clough1
- Chapelle du monastère du Carmel de Nantes1
- Charles Brodrick1
- Charles Bruce, 3rd Earl of Ailesbury1
- Charles Ede1
- Charles Spencer, 3rd Duke of Marlborough1
- Charles Spencer, 3rd Earl of Sunderland1
- Charles Stephen Ascherson1
- Charles V. Wheeler1
- Charles-Benoit de Campigny1
- Charlier de Namur1
- Chasseigne family1
- Chiswick Book Shop1
- Christian Gottlieb Schwarz1
- Christopher Cheney1
- Christophorus de Stinglhaim1
- Château d'Anet1
- Clarence S. Bement1