Piazza Navona is a public open space in Rome, Italy. It is built on the site of the Stadium of Domitian, built in the 1st century AD, and follows the form of the open space of the stadium. The ancient Romans went there to watch the agones, and hence it was known as "Circus Agonalis".
The Ponte Vecchio is a medieval stone closed-spandrel segmental arch bridge over the Arno River, in Florence, Italy. It is noted for the shops built along it, as was once common. Butchers, tanners, and farmers initially occupied the shops; the present tenants are jewelers, art dealers, and souvenir sellers.
The Colosseum or Coliseum, also known as the Flavian Amphitheatre, is an oval amphitheatre in the centre of the city of Rome, Italy. Built of travertine limestone, tuff, and brick-faced concrete, it was the largest amphitheatre ever built at the time and held 50,000 to 80,000 spectators.