Former Owner
- Convent of San Domenico1
- Convento di San Giusto alle Mura1
- Convento di San Paolo1
- Coppo family1
- Cordwainer Smith1
- Cornelius John Hauck1
- Corp. Thomas Tay1
- Cosimo de' Medici1
- Count Alexis de Golowkin1
- Count Johann Nepomuk Wilczek1
- Couvent des Minimes (Clermont-Tonnerre, France)1
- Couvent des pères Franciscains (Monte-Carlo, Monaco)1
- Cover of a binding, illegible on what was the outer side.1
- Cox Macro1
- Craven Ord1
- Cristoferus Chrewczer1
- Curt H. Reisinger1
- Cyrus Adler1
- Cyrus Longworth Lundell1
- César de Missy1