License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Max Klinger. Phantasie und Künstler (Imagination and the Artist) (recto); Studie zu Phantasie und Künstler (Study for Imagination and the Artists) (verso), 1873. The Metropolitan Museum of Art.