The church, built in the 11th century, rises above the mediaeval walls and includes, in part, the ancient ramparts.
It was a Benedictine church belonging to the Montecassino abbey and was part of the Arnolfi possessions. The building, with a central bell tower opened by a single lancet window and an oculus, was remodelled several times over the centuries.
The interior consists of a large nave with an apse and a 17th century fresco representing St. Michael the Archangel. There are fragments of paintings along the wall including a resurrected Christ from the workshop of Piermatteo d'Amelia. Chapels decorated in the 1600s open up along the right of the nave.
The Church of St. Michael the Archangel houses numerous archaeological finds found in the area of Cesi and coming from Carsulae. It is currently used as an auditorium and cultural centre.
