pasquinade (n.)

also Pasquin, "a libelous public lampoon," 1650s, from Middle French, from Italian pasquinata (c. 1500), from Pasquino, name given to a mutilated ancient statue (now known to represent Menelaus dragging the dead Patroclus) set up by Cardinal Caraffa in his palace in Rome in 1501; the locals named it after a schoolmaster (or tailor, or barber) named Pasquino who lived nearby. A custom developed of posting satirical verses and lampoons on the statue.