License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Theodor Richard Edward von Holst. A nude youth on horseback, a male nude with raised arm, and a cloaked bearded man (recto). A sleeping girl and a man in medieval dress (verso), 1830–44. The Metropolitan Museum of Art.