License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Hubert Robert. Plate 8: The Triumphal Arch: a man standing atop an architectural fragment in center with two men below, seen from behind, remains of a triumphal arch in the background and the ruins of an arcade to right, from "Les soirées de Rome", ca. 1763–64. The Metropolitan Museum of Art.