ça Ira, a song of the French Revolution, with the refrain: -
"Ah! ça ira, ça ira, ça ira!
Les aristocrates à la lanterne."
The words, written by one Ladré, a street singer, were put to an older tune, called "Le Carillon National," and the song rivalled the "Carmagnole" (q.v.) during the Terror. It was forbidden by the Directory.