Former Owner
- Charlier de Namur1
- Chasseigne family1
- Chiswick Book Shop1
- Christian Gottlieb Schwarz1
- Christopher Cheney1
- Christophorus de Stinglhaim1
- Château d'Anet1
- Clarence S. Bement1
- Claude d'Urfé1
- Clement Griscom1
- Collège Saint-Clément1
- Coluccio Salutati1
- Convent of San Domenico1
- Coppo family1
- Cordwainer Smith1
- Cortlandt F. Bishop1
- Cox Macro1
- Daniele Florio1
- David Laing1
- David Swan1