License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Lorenzo Veneziano. Design for an Antependium: The Madonna della Misericordia with Saints John the Baptist and John the Evangelist, the Circumcision, and the Presentation of the Virgin, ca. 1370. The Metropolitan Museum of Art.