The city center is surrounded by walls built in the 15th century. Within them, in Piazza della Signoria, there is the Fountain of Neptune by Bartolomeo Ammannati, which is a masterpiece of marble sculpture and is part of a still functioning Roman aqueduct.
Most of the city was built during the Renaissance, although its layout and structure in many respects refer to Roman times (garrison settlement). In addition to Renaissance architecture, you can also find traces of medieval, baroque, classical, and modern architecture in the city.
