License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Francesco Piranesi. View of the interior of the city of Pompeii, from "Antiquités de Pompeïa, tome premier, Antiquités de la Grande Grèce..." (Antiquities of Pompeii, volume one, Antiquities of Great Greece...), volume 1, plate 6, 1804. The Metropolitan Museum of Art.