Former Owner
- Chiswick Book Shop1
- Christian Brevoort Zabriskie1
- Christian Gottlieb Schwarz1
- Christie's1
- Christine Blondeau1
- Church of St James, Sarsden1
- Cini Johan de Barisani1
- City College of New York1
- Clarence Howard Clark, Sr.1
- Claude Joseph Constant Despine1
- Claude Le Muet1
- Claude de Fonsèque1
- Clemente Carilli1
- Coluccio Salutati1
- Conradus Eerens1
- Convent San Marco1
- Coppo family1
- Cordwainer Smith1
- Cornelius John Hauck1
- Cortlandt F. Bishop1