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".
La naissance de la lyre La naissance de la lyre ("The Birth of the Lyre") is an opera (styled a "conte lyrique") in one act by the French composer Albert Roussel. The libretto, by Théodore Reinach, is based on the satyr play "Ichneutae" by Sophocles. It was first performed at the Paris Opéra on 1 July 1925 with choreography by Bronislava Nijinska.