License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Anonymous, Italian, Piedmontese, 18th century. Sketch for the Rear Arched Area of a Chapel, with an Angel and Three Putti Holding Up a Plate with the Head of the Baptist, 1700–1780. The Metropolitan Museum of Art.