Church of S. Angelo al Cassero: the crypt
During the restoration of the church, different alignments of the walls were discovered in the crypt, characterised by large, square blocks belonging to the Etruscan wall circle (fourth century BC). Two showcases display archaic Etruscan (bucchero and impasto ware) and Hellenistic finds (grey and black-painted ceramics) discovered on the site, as well as the cover of a cinerary urn with Etruscan inscription (third century BC).

Piazzale del Cassero (The Keep’s Square) Underground archaeological itinerary
From the Etruscan settlement to the medieval towers
The underground itinerary includes areas which have been researched into in various excavation campaigns between 1991 and 2004.
The site demonstrates an extraordinary continuity of life in ancient times, from the 8th century B.C. to the Middle Ages.
The structures of the first half of the 14th century were demolished and brought to their present state due to the total transformation of the town, desired by the Bishop Tarlati, when the inhabited quarters of the Keep were converted into a fortress.
Several walled structures belonging to a sacred Etruscan area are specially important.
Several articulated areas annexed to the temple, with a north-south orientation and a rectangular layout (17x22 m), and very similar to that of the Etruscan temples of which Vitruvius spoke in De Architectura, can be seen.
The podium was made of large blocks of stone, and the pronaos featured four columns placed in two rows with the entrance steps carved out of the rock. The materials used for the decoration of the roof (reconstructed in the museum) roofing tiles, architectural slabs painted with palmettes and black, white, and red lotus flowers, part of a polychrome sima decorated in relief with a frieze of white lilies and red roses with a Gorgon’s head and various lion’s head antefixes, can be dated around the mid-fourth century BC. The sanctuary, however, also had two other phases of life: the earliest towards the end of the VI century BC and the most recent in the second century BC.