Columbia subject headings:
Harvard subject headings:
Architecture--France--Paris
Opera--France--Paris
Opéra de Paris--Buildings--History.
Opéra de Paris.
Paris (France)--Buildings, structures, etc.
Theaters--France--Paris--History.
Princeton subject headings:
Opéra de Paris--Buildings--History.
Opéra de Paris--History.
Paris (France)--Buildings, structures, etc.