Opera History and criticism 145 Operas 123 Music 109 History 101 Production and direction 63 Opéra 53 více ... Criticism and interpretation 40 Singers 40 Oper 36 Dramaturgy 35 Social aspects 32 Composers 27 Opéras 26 Philosophy and aesthetics 26 Political aspects 22 Libretto 20 Ballet 19 Performances 18 Dictionaries 17 Music and literature 17 Stories, plots, etc 16 Analysis, appreciation 15 Musicians 14 Theaters 14 Stage-setting and scenery 13 Theater 13 Concerts 11 Librettos 11 Opera's 11 méně ...