Teatro Marcello station
13 paikallista suosittelee,
The 1st Rome's Colisseum. It's smaller than the famous one but is awesome like it.
I recommend a very nice walk through the ancient Ghetto, visit Portico d'Ottavia and have a nice meal in the area. Try "Carciofi alla Giudea" or "Carciofi alla Romana" in one of the restaurants as "Giggetto al Portico d'Ottavia".
Roman theater wanted and built by Emperor Augustus, too often overshadowed by the imposing Colosseum! It is located a few steps from the Campidoglio hill, the place already established by the antiquity of the city's administrative power.