License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Stefano della Bella. The Castel Sant'Angelo and the Pont Sant'Angelo in Rome, various boats unloading to right, two pilgrims with children seated to left, from "Varie Figure", ca. 1645. The Metropolitan Museum of Art.