Here are entered general works about opera. Musical compositions in this form are entered under the heading Operas. --subdivision In opera under names of individual persons, under names of individual deities, mythological and legendary figures, and fictitious characters, and under names of countries, cities, etc., for works on those persons and places in opera.
Here are entered works on facilities used to stage drama. Works on drama as a literary form are entered under Drama. Works on drama as acted on the stage are entered under Theater. --names of individual theaters