Piazza del Mercato, Lucca
Go and take a look at the main square: Piazza del Mercato. Under this square are th rests of an old arena. When the arena was out of use the Italians build on it again and again. When it was dug up again it was in a terrible state and that was why there was a square made on top of it, with houses and gates surrounding it (only one of the gates is really an original arenagate). You can discover more about this square in my TRAVELLOGUE!