The Benedictine Territorial Abbey (i.e. exerting diocesan authority over itself and the surrounding territory, instead of resorting under a bishop) of San Michele Arcangelo, exists at least from 1078 and was probably built in the 5th century.
The Norman lord Humphrey of Hauteville and his son Rudolph made large donations to the abbey, which flourished until the 15th century.
Afterwards it decayed due to numerous wars ravaging the country in those years.
The benedictine Abbey Church (12th century), dedicated to St. Michael, has a notable portal and a Norman-style bell tower with mullioned windows.
Renewed starting from 1590, it received a cylindrical cupola in 1650.