Biblioth?que Imperiale du Louvre. Dated: 1856-1857. Dimensions: sheet (trimmed to image): 44.3 x 34.1 cm (17 7/16 x 13 7/16 in.) support: 47 x 35.8 cm (18 1/2 x 14 1/8 in.) overall: 71.1 x 55.9 cm (28 x 22 in.). Medium: salted paper print from collod