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 roi de Lahore Le roi de Lahore ("The king of Lahore") is an opera in five acts by Jules Massenet to a French libretto by Louis Gallet. It was first performed at the Palais Garnier in Paris on 27 April 1877 in costumes designed by Eugène Lacoste and settings designed by Jean Émile Daran (Act I, scene 1), Auguste-Alfred Rubé and Philippe Chaperon (Act I, scene 2; Act V), Louis Chéret (Act II), Jean-Baptiste Lavastre (Act III), Antoine Lavastre and Eugène Louis Carpezat (Act IV).