Which opera has more parts including acts and tableaux, Le roi d'Ys or Stiffelio?
Le roi d'Ys Le roi d'Ys ("The King of Ys") is an opera in three acts and five tableaux by the French composer Édouard Lalo, to a libretto by Édouard Blau, based on the old Breton legend of the drowned city of Ys. That city was, according to the legend, the capital of the kingdom of Cornouaille.
Polyxène et Pirrhus Polyxène et Pirrhus ("Polyxena and Pyrrhus") is an opera by the French composer Pascal Collasse, first performed at the Académie Royale de Musique (the Paris Opéra) on 21 October 1706. It takes the form of a "tragédie lyrique" in a prologue and five acts. The libretto is by Jean-Louis-Ignace de La Serre.