Do both Simon Boccanegra and Le roi d'Ys have the same number of acts?
Simon Boccanegra Simon Boccanegra (] ) is an opera with a prologue and three acts by Giuseppe Verdi to an Italian libretto by Francesco Maria Piave, based on the play "Simón Bocanegra" (1843) by Antonio García Gutiérrez, whose play "El trovador" had been the basis for Verdi's 1853 opera, "Il trovatore".
Le Diable amoureux (ballet) Le Diable amoureux (also known as Satanella or Love and Hell) is a "ballet pantomime" in three acts and eight scenes, originally choreographed by Joseph Mazilier to the music of Napoléon Henri Reber and François Benoist. The libretto by Jules-Henri Vernoy de Saint-Georges is based on Jacques Cazotte's 1772 occult romance "The Devil in Love". The work was first presented by the Ballet du Théâtre de l'Académie Royale de Musique in Paris on 23 September 1840, with Pauline Leroux (as Uriel), Mazilier (as Alvaro, for ballet his name is Frederic), and Louise Fitz-James (as Lilia).