Little by little they abandoned this natural housing environment in favor of small strengthened installations made of polygonal walls on the plateau of Mount Santa Croce. Excavations made in the place known as Omini Morti brought to light a necropolis of Etruscan type with skeletons adorned with bronze belts, iron lances, jewels as well as vases enameled in terracotta and painted. These objects give evidence of trade with the valley.