Former Owner
- Claude Joseph Constant Despine1
- Claude Le Muet1
- Claude de Fonsèque1
- Clemente Carilli1
- Collegium Germanicum et Hungaricum1
- Comte André de Riaucourt1
- Convent San Marco1
- Coppo family1
- Cordwainer Smith1
- Cornelius John Hauck1
- Cosimo de' Medici1
- Count Alexis de Golowkin1
- Count Johann Nepomuk Wilczek1
- Cristoferus Chrewczer1
- Curt H. Reisinger1
- D'Assonleville family1
- D. Andreas Parisino1
- David Bickersteth Magee1
- Davis & Harvey1
- Davis & Orioli1