Columbia subject headings:
Amphitheaters--Rome--Congresses.
Art, Roman--Themes, motives--Congresses.
Chariot racing--Rome--Congresses.
Circus in art--Congresses.
Circus--Rome--Congresses.
Games--Rome--Buildings--Congresses.
Gladiators in art--Congresses.
Rome--Antiquities--Congresses.
Stadiums--Rome--Congresses.
Harvard subject headings:
Amphitheaters--Rome--Congresses.
Art, Roman--Themes, motives--Congresses.
Chariot racing--Rome--Congresses.
Circus in art--Congresses.
Circus--Rome--Congresses.
Games--Rome--Buildings--Congresses.
Gladiators in art--Congresses.
Rome--Antiquities--Congresses.
Stadiums--Rome--Congresses.
Princeton subject headings: