Do both Simon Boccanegra and Le roi d'Ys have the same number of acts?
Le roi d'Ys Le roi d'Ys ("The King of Ys") is an opera in three acts and five tableaux by the French composer Édouard Lalo, to a libretto by Édouard Blau, based on the old Breton legend of the drowned city of Ys. That city was, according to the legend, the capital of the kingdom of Cornouaille.
Daphnis et Alcimadure Daphnis et Alcimadure (in Occitan classical norm, Dafnís e Alcimadura, or according to the original libretto spelling, Daphnis e Alcimaduro) is an opera by the Baroque violinist, conductor and composer Jean-Joseph Cassanéa de Mondonville to a libretto in the Occitan language, written by the composer himself and loosely inspired by La Fontaine's fable bearing the same title. It takes the form of a pastorale in three acts and was later endowed with a prologue in French entitled "Les jeux floraux", to a libretto by Claude-Henri de Fusée de Voisenon.