Do both Simon Boccanegra and Le roi d'Ys have the same number of acts?
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.
Les brigands Les brigands ("The Bandits") is an opéra bouffe, or operetta, by Jacques Offenbach to a French libretto by Henri Meilhac and Ludovic Halévy. Meilhac and Halévy's libretto lampoons both serious (Schiller's play set to music by Verdi) and light theatre ("Fra Diavolo" and "Les diamants de la couronne" by Auber). The plot is cheerfully amoral in its presentation of theft as a basic principle of society rather than as an aberration. As Falsacappa, the brigand chieftain, notes: "Everybody steals according to their position in society". The piece premiered in Paris in 1869 and has received periodic revivals in France and elsewhere, both in French and in translation.