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. Two men sweeping the street while a crowd of people in the background watch, illustration for 'Coleccion de Canciones Modernas Cuaderno No. 14,' edited by Antonio Vanegas Arroyo, 1891 (a later impression). The Metropolitan Museum of Art.