• CAGPR = Galleria Pallavicini (Roma)
• CAGPR = Palazzo Pallavicini Rospigliosi (Roma)
• CAGPR = Palazzo Rospigliosi Pallavicini (Roma)
• CAM = Cincinnati Art Museum (Cincinnati)
• 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)
• CPT = Museo Tesoro Catedralicio (Toledo)
• CRG = Capilla Real (Granada)