License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
François Boucher. Frontispiece, from Nouveau Livre d'Academies Peintes a Rome par les Eleves de l'Académie Royale de Peinture et Sculpture (New Book of the Academy Painted in Rome by the Pupils of the Royal Academy of Painting and Sculpture), 1759. The Metropolitan Museum of Art.