Columbia subject headings:
Amphitheaters--Rome.
Circus--Rome.
Colosseum (Rome, Italy)
Rome--Antiquities.
Stadiums--Rome.
Theaters--Rome.
Harvard subject headings:
Amphitheaters--Rome.
Circus--Rome.
Colosseum (Rome, Italy)
Rome--Antiquities.
Stadiums--Rome.
Theaters--Rome.
Princeton subject headings:
Amphitheaters--Rome.
Circus--Rome.
Colosseum (Rome, Italy)
Rome--Antiquities.
Stadiums--Rome.
Theaters--Rome.