Piazza Navona is one of the oldest piazzas in Rome. It was built in ​​the 1st Century AD, as the Stadium of Domitian. It was once a competition arena where the Romans went to see games. You could argue it was the Colosseum before the Colosseum. Today you can see two fountains in the center of the piazza, which is surrounded by palaces and churches. The piazza was made famous by the movie Angels and Demons starring Tom Hanks, which was a movie adaptation of the book, also set in Rome. Hours: Piaz