The urbanized civitas includes integrated structures starting from the Iron Age and extending to the 5th century. There were specifically three phases of spatial organization: from the 1st century BC, under the reign of Augustus, a late Republican forum (which included a crypto-portico, basilica, curia and commercial shops), thermal baths, an aqueduct and pre-Roman residential buildings; a 1st-century AD group, established under Flavius, that included a reconstructed Imperial forum, Vitruvian baths and a revised urban plan; and a 3rd-century settlement that fell within revised walls.