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".
Las Hermanas (ballet) Las Hermanas is a one-act ballet created by Kenneth MacMillan in 1971 for the Royal Ballet. The music is Frank Martin's Harpsichord Concerto (1952). The piece is loosely based on "The House of Bernarda Alba" by Federico García Lorca.