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 Emperor Seated on His Throne, Seated Between Joanna of Castile and Mary of Burgundy, Above Are Twenty-two Winged Victories; with Coats of Arms of Maximilian's Noble Relatives, from the Arch of Honor, proof, dated 1515, printed 1517-18, 1515. The Metropolitan Museum of Art.