Do the operas Don Carlos and Pomone have the same number of acts?
Don Carlos Don Carlos is a five-act grand opera composed by Giuseppe Verdi to a French-language libretto by Joseph Méry and Camille du Locle, based on the dramatic play "Don Carlos, Infant von Spanien" ("Don Carlos, Infante of Spain") by Friedrich Schiller. The opera is usually performed in an Italian translation. In addition, it has been noted by David Kimball that the Fontainebleau scene and auto da fé "were the most substantial of several incidents borrowed from a contemporary play on Philip II by Eugène Cormon".
Le diable à quatre (ballet) Le Diable à quatre is a ballet in two acts and three scenes (or in three acts), with choreography by Joseph Mazilier, music by Adolphe Adam, and libretto by Adolphe de Leuven, first presented by the Ballet of the Académie Royale de Musique on 11 August 1845, with Carlotta Grisi (as Mazourka) and Lucien Petipa (as Count Polinski).