Leonardo da Vinci, 1452-1519. "Nude standing man seen from behind". Facsimile of the original "Study of a Standing Male Nude seen from behind", c. 1504/06 (red chalk, 270 × 16 mm. Windsor Castle, Royal Library, RL 12596 r, RCIN 91596). Reproduction (carbon print) after photography of Photographische Kunstanstalt Adolphe Braun (Adolphe Braun, 1812-1877, in collaboration with Charles Braun, 1815-1872, Henri Braun, 1837-1876, and Gaston Braun, 1845-1928). From the portfolio: Drawings by Leonardo da Vinci. Reproduced and published by Braun and Cie., Paris, Dornach (Alsace), London and New York, part II, 60 hand drawings on 40 plates, no. 29. Private collection.