Opera Operas 867 History 864 History and criticism 825 Music 629 Production and direction 437 Opéra 435 Mais ... Criticism and interpretation 422 MUSIC 408 Theater 395 Oper 337 Genres & Styles 334 Composers 261 Singers 243 Opéras 218 Theaters 205 Stage-setting and scenery 190 Dramaturgy 182 Ballet 151 Opera's 149 Libretto 147 Librettos 146 Printed Music 137 Social aspects 136 Philosophy and aesthetics 123 Histoire 122 Musique 115 Analysis, appreciation 106 Music and literature 105 Performances 103 menos ...