Former Owner
- Clément de Renesse-Breidbach1
- Coella Lindsay Ricketts75
- Coggeshall Abbey1
- Collegium Agennensis societatis Jesu (Agen, France)2
- Collegium Germanicum et Hungaricum1
- Collège Saint-Clément1
- Cologne Charterhouse3
- Coluccio Salutati1
- Compagnia della Vergine Maria (Cento, Italy)1
- Comte André de Riaucourt1
- Comte Chandon de Briailles1
- Comte d'Aspremont-Lynden1
- Condat Abbey1
- Confraternity of the Five Wounds at the Church of Saint-Pierre-La-Tour, Le-Puy-en-Velay1
- Constance de Foix1
- Convent San Marco1
- Convent of San Domenico1
- Convento di San Paolo1
- Coppo family1
- Cordwainer Smith1