License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Honoré Daumier. Come on... don't be such a bourgeois.... at least have a look at this Courbet!, from 'Sketches from the Salon,' published in Le Charivari, June 22, 1865, June 22, 1865. The Metropolitan Museum of Art.