Columbia subject headings:
Theater architecture.
Theaters--Italy--Emilia-Romagna.
Harvard subject headings:
Architecture--Italy--Emilia-Romagna--History.
Historic buildings--Italy--Emilia-Romagna.
Theaters--Italy--Emilia-Romagna--Designs and plans.
Theaters--Italy--Emilia-Romagna--History.
Princeton subject headings:
Theater architecture.
Theaters--Italy--Emilia-Romagna.