License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
José Guadalupe Posada. Cover for "Nueva Coleccion de Canciones para el Presente Año"; a man with a guitar placing his arm around a woman's shoulder while another woman watches them, ca. 1880–1910. The Metropolitan Museum of Art.