Wikipedia
Démophoon
Démophoon (sometimes spelt Démophon) is an opera by the composer Luigi Cherubini, first performed at the Académie Royale de Musique (the Paris Opera) on 2 December 1788. It takes the form of a tragédie lyrique in three acts. The libretto, by Jean-François Marmontel, is based on Demofoonte by Metastasio.