Between Pelléas et Mélisande and Riders to the Sea, which one has more acts?
Pelléas et Mélisande (opera) Pelléas et Mélisande ("Pelléas and Mélisande") is an opera in five acts with music by Claude Debussy. The French libretto was adapted from Maurice Maeterlinck's Symbolist play "Pelléas et Mélisande". It premiered at the Opéra-Comique in Paris on 30 April 1902 with Jean Périer as Pelléas and Mary Garden as Mélisande in a performance conducted by André Messager, who was instrumental in getting the Opéra-Comique to stage the work. The only opera Debussy ever completed, it is considered a landmark in 20th-century music.
Ernelinde, princesse de Norvège Ernelinde, princesse de Norvège ("Ernelinde, Princess of Norway") is a three-act operatic tragédie lyrique, by the French composer François-André Danican Philidor. The libretto was by Antoine-Alexandre-Henri Poinsinet, after Francesco Silvani's opera libretto "La fede tradita, e vendicata".