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 4: remains of a classical monument to right surmounted by a mask and tablet, a figure sitting on the porch, four figures on a staircase to left, four milestones below, from "Les soirées de Rome", 1763. The Metropolitan Museum of Art.