License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
José García Hidalgo. Study of a naked man playing a vihuela, a child holding a sheet of music at the left, from "Principios para estudiar el Nobilísimo y Real arte de la Pintura", ca. 1693. The Metropolitan Museum of Art.