License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Parmigianino (Girolamo Francesco Maria Mazzola). Head of a Bearded Man in Profile to Left, possibly the Portrait of the Poet Giorgio Anselmi (ca. 1459-1528), with Faint Sketch of a Skull-like Head, 1503–40. The Metropolitan Museum of Art.