arrondissement of Paris  and is served by the metro station  Opéra  and bus 21, 22, 27, 29, 42, 53, 66, 68, 81, 95. Upon its  inauguration  in  1875 , the opera house was officially named the  Académie Nationale de Musique - Théâtre de l'Opéra . It retained this title until 1978