Former Owner
- Charles Thomas-Stanford1
- Charles Towneley1
- Charles-Henri de Clermont-Tonnerre1
- Chartreuse Saint-Sixte de Rettel1
- Chichester Cathedral1
- 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