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.
Le maréchal ferrant Le maréchal ferrant ("The Blacksmith") is a 1761 French two-act "opéra comique" with spoken dialogue and music composed by François-André Danican Philidor as well as several "vaudevilles" (popular old songs with new words), which were typically included in "opéras comiques" of the time. The libretto is by Antoine François Quétant, after one of the stories in Boccaccio's "Decameron" (VII, 1), with verses for the "ariettes" by Louis Anseaume and a plan devised by Serrière.