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.
L'Aiglon L'Aiglon is a play in six acts by Edmond Rostand based on the life of Napoleon II, who was the son of Emperor Napoleon I and his second wife, Empress Marie Louise. The title of the play comes from a nickname for Napoleon II, the French word for "eaglet" (a young eagle).