Former Owner
- Burndy Library1
- Byron Reed1
- C Traylen Bookshop1
- C. Bruscoli1
- C. Duca Visconti Modrone1
- C. W. S. Dixon1
- C.B1
- C.J. Spence1
- Caesareum Societatis Jesu Collegium Viennense1
- Cambrai Cathedral1
- Cambron Abbey1
- Carl Hermann Grabauer1
- Carlo Francesco Frasconi1
- Castel-Lodève family1
- Castelluci1
- Catherina van Drenckwaert1
- Catherine de' Medici1
- Cati S Thomas1
- Caxton Club1
- Cecil Dunn Gardner1