License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Giovanni Antonio da Pordenone (Giovanni Antonio de Sacchis). Design for the Decoration of a Pilaster (recto); Putti with Trophies and Seated Figure with Child (verso), ca. 1529. The Metropolitan Museum of Art.