Opera in 4 acts by Verdi to lib. by Ghislanzoni, being It. trans. from Fr. prose of Camille du Locle based on plot by Fr. Egyptologist Auguste Mariette Bey (Verdi had major hand in lib. and wrote words of final duet ‘O terra, addio’). Metastasio's lib. Nitteti (1756) was major source of plot. Commissioned by Khedive of Egypt (but not, as is often said, for opening of either Suez Canal or Cairo Opera House). Comp. 1870. F.p. Cairo 1871, La Scala 1872 (with extra aria for Aida), NY 1873, Met 1886 (in German), London 1876. Spelling Aïda, with diaeresis, is incorrect in It.