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".
Cora (opera) Cora is an opera in four acts by the French composer Étienne Méhul. The libretto, by Valadier, is based on the novel "Les Incas" by Jean-François Marmontel. It was the first opera Méhul wrote but the second to be performed, receiving its premiere at the Académie Royale de Musique (the Paris Opéra) on 15 February 1791. "Cora" was not a success and there were only four more performances (18, 20, 25 February and 4 March).