Columbia subject headings:
Arch of Constantine (Rome, Italy)
Colosseum (Rome, Italy)
Harvard subject headings:
Arch of Constantine (Rome, Italy)
Colosseum (Rome, Italy)
Rome (Italy)--Antiquities, Roman.
Princeton subject headings:
Arch of Constantine (Rome, Italy)
Colosseum (Rome, Italy)
Rome (Italy)--Antiquities, Roman.