License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Hans Springinklee. The Upper Section of the Left Portal, with the Inscription on a Lion Skin; a Frieze with Busts of Roman Emperors; and Entablature of the Columns, from the Arch of Honor, proof, dated 1515, printed 1517-18, 1515. The Metropolitan Museum of Art.