License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Anonymous, French, 18th century. The Bombardment of All the Thrones of Europe and the Fall of the Tyrants for the Happiness of the Universe (Bombardement de Tous les Trônes de l'Europe et la Chûte des Tyrans pour la Bonheur de l'Univers), ca. 1792. The Metropolitan Museum of Art.