Opera 18 Criticism and interpretation 14 Composers 11 History and criticism 4 Influence 4 Music 4 History 2 Máis ... Italian influences 2 Political aspects 2 Appreciation 1 Critique et interprétation 1 French influences 1 Homes and haunts 1 Influence (Literary, artistic, etc.) 1 Knowledge and learning 1 Librettists 1 Literature 1 Philosophy and aesthetics 1 Relations with actors 1 Theater 1 menos ...