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 Lodoiska La Lodoiska is an opera in three acts by Simon Mayr to an Italian libretto by Francesco Gonella De Ferrari. It was Mayr's second opera and premiered at La Fenice in Venice on 26 January 1796.