Former Owner
- Coella Lindsay Ricketts62
- Coggeshall Abbey1
- Collegium Agennensis societatis Jesu (Agen, France)2
- Collegium Germanicum et Hungaricum1
- Cologne Charterhouse3
- Compagnia della Vergine Maria (Cento, Italy)1
- Comte André de Riaucourt1
- Comte Chandon de Briailles1
- Comte d'Aspremont-Lynden1
- Condat Abbey1
- Constance de Foix1
- Convent San Marco1
- Convento di San Paolo1
- Cordwainer Smith1
- Cornelius John Hauck1
- Corp. Thomas Tay1
- Cortlandt F. Bishop1
- Cosimo de' Medici1
- Count Alexis de Golowkin1
- Cristoferus Chrewczer1