License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Giorgio Ghisi. Apollo, Neptune, Pluto, and Athena seated on a cloud under an arch, an oval composition, from a series of eight compositions after Francesco Primaticcio's designs for the ceiling of the Ulysses Gallery (destroyed 1738-39) at Fontainebleau, ca. 1560–69. The Metropolitan Museum of Art.