Regio IX Circus Flaminius

Regio IX took its name from the racecourse located in the southern end of the Campus Martius, close to Tiber Island.

Regio IX was defined by the presence of the Circus Flaminius, situated on the Campus Martius, whose field stood well into the Middle Ages.

[2] Attached to the Circus Flaminius were the four stables that belonged to each of the factions in the chariot races: the Red, White, Green, and Blue teams.

[5] In terms of other types of monuments and buildings, this region possessed the ancient Altar of Mars (located beside the modern Doria Pamphilj Gallery) to the south, while to the north sat the Mausoleum of Augustus.

Near where the Column of Antoninus Pius stood was also kept the Solarium Augusti, a giant sundial, as well as the Ara Pacis, the Altar of Peace.