The Byzantine Castle of the Finale, known as Castrum Perticae, is located on top of Rocca Carpanea. It was a fortress sheltered from Saracen incursions and was organized
with a triple series of walls and towers to protect the highest parts. Inside the fortress there are some residential areas with masonry foundations where numerous archaeological finds have been
found that have highlighted three main settlement phases dating back to the late Bronze Age. The most intense phase of occupation, however, concerns the building of the mighty fortification
between the end of the VI and the beginning of the VII century.
During the 12th century the fortress was abandoned as the village developed. The people, however, continued to live in the surrounding area and perhaps used the disused military structures. In the area between the Church of San Antonino and the Castrum the "slaughterhouse" and market activities developed. The slaughtering activity was regulated by precise rules where it was necessary to declare the origin of the meat that was sold to the "overseers" who established the price. Extremely severe penalties were reserved for butchers who sold meat not of the required quality: a fine of 100 money or, in case of insolvency, the cut of the hand!
The Perti Castrum is one of the best preserved late ancient fortifications in northern Italy.