Circus Maximus

The Circus Maximus, the largest building for the spectacle of antiquity and one of the largest of all time (600 m long by 140 m wide), is connected by legend to the origins of the city itself. The competitions that took place in the Circus were the most popular competitive activities of the Romans, along with gladiatorial games: the conductors of the quadrigues soon became idolized characters by the people of Rome.

Devastated several times by fire, the Circus Maximus was rebuilt almost entirely under the principality of Trajan, to whose phase belong most of the structures currently visible. 
within walking distance (10 minutes)