Photograph of a male hysteric in the arc-de-cercle pose from the Bibliothèque Charcot, Paris, illustrated in Christopher G. Goetz, Michel Bonduelle and Toby Gelfand, Charcot: Constructing Neurology , Oxford, 1996, 204, figure 6-6b. 

vs

Auguste Rodin, Kneeling Man (Hommeà genoux). Glass plate,dimensions unknown. Paris:Musée Rodin