Former Owner
- Chartreuse de Val-Saint-Esprit1
- Christian Brevoort Zabriskie1
- Christian Friedrich August Günther1
- Christopher Tschudin1
- Claude Augustin de Cosson1
- Clement VII1
- Clemente Carilli1
- Collegium Germanicum et Hungaricum1
- Convent San Marco1
- Cornelius John Hauck1
- Cosimo de' Medici1
- Count Johann Nepomuk Wilczek1
- Cristoferus Chrewczer1
- D. Andreas Parisino1
- D. Manning1
- Damiano Muoni1
- David McRoberts1
- David Pulsifer1
- David Werner Amram1
- Dean Putnam Lockwood1