License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Lambert Suavius. Vertical Landscape with the Ruins of the Temple of Venus and Roma, from "Ruinarum variarum fabricarum delineationes pictoribus caeterisque id genus artificibus multum utiles", 1554. The Metropolitan Museum of Art.