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 opposite the entrance gate of all of the shops to the right and left of the street 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 13, 1804. The Metropolitan Museum of Art.