• CAM = Cincinnati Art Museum (Cincinnati)
• Cappella Sistina = Cappella Sistina (Vaticano)
• Carige = Collezione d’Arte della Banca Carige (Genova)
• Carnavalet = Musée Carnavalet (Paris)
• CBF = Casa Buonarroti (Firenze)
• CIA = Courtauld Institute of Art (London)
• Clark = Clark Art Institute (Williamstown)
• CM = Columbia Museum of Art (Columbia)
• CMA = Cleveland Museum of Art (Cleveland)
• CMOA = Columbus Museum of Art (Columbus)
• Condé = Musée Condé (Chantilly)
• Correr = Museo Correr (Venezia)
• CRG = Capilla Real (Granada)