Do War and Peace and Mireille have the same number of acts?
War and Peace (opera) War and Peace (Op. 91) (Russian: Война и мир , "Voyna i mir") is an opera in two parts (an Epigraph and 13 scenes), sometimes arranged as five acts, by Sergei Prokofiev to a Russian libretto by the composer and Mira Mendelson, based on the novel "War and Peace" by Leo Tolstoy. Although Tolstoy's work is classified as a novel, the 1812 invasion of Russia by the French was based on real-life events, and some real-life people appear as characters in both the novel and the opera, e.g. Prince Mikhail Kutuzov and Napoleon Bonaparte.
Two Merry Monarchs Two Merry Monarchs is an Edwardian musical comedy in two acts with a book by Arthur Anderson and George Levy, lyrics by Anderson and Hartley Carrick, and music by Orlando Morgan. It opened at the Savoy Theatre in London on 10 March 1910, under the management of C. H. Workman, and ran there for 43 performances. It starred Workman, Robert Whyte Jr., Lennox Pawle, Daisy le Hay and Roland Cunningham. The work was the last piece that could be considered a Savoy opera.