Former Owner
- Benoît Le Court1
- Boies Penrose II1
- Budapest University of Jewish Studies1
- Burg Kreuzenstein1
- Caesareum Societatis Jesu Collegium Viennense1
- Carleton Rubira Richmond1
- Carlo Morbio1
- Cecil Deedes1
- Charles D. Humberd1
- Charles Hurleston1
- Charles Kothen1
- Charles Marriette1
- Charles Stephen Ascherson1
- Chartreuse Saint-Sixte de Rettel1
- Clemente Carilli1
- Collegium Germanicum et Hungaricum1
- Coluccio Salutati1
- Count Johann Nepomuk Wilczek1
- Cristoferus Chrewczer1
- D. Andreas Parisino1