License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Giuseppe Galli Bibiena. Ground Plan for a Catafalque for a Duke of Wolfenbüttel-Brunswich, probably Anton Ulrich (d. 1714), 1696–1756. The Metropolitan Museum of Art.