License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Cherubino Alberti (Zaccaria Mattia). Jupiter, seated above two eagles and embracing Cupid, a round composition from a series of mythological scenes after Polidoro da Caravaggio, ca. 1590. The Metropolitan Museum of Art.