Columbia subject headings:
Colosseum (Rome, Italy)
Rome (Italy)--Buildings, structures, etc.
Harvard subject headings:
Ampitheaters--Italy--Rome.
Colosseum (Rome, Italy)
Rome (Italy)--Antiquities.
Rome (Italy)--Buildings, structures, etc.
Princeton subject headings:
Colosseum (Rome, Italy)
Rome (Italy)--Antiquities.