The main characteristic of the monumental temple is the material used to build it: the structure of the building was constructed with travertine stone with alabaster, found in a nearby mine in Castelnuovo dell’Abate. The imposing bell tower is built in the Romanic-Lombardy style with small, suspended arches, and both single and double lancet windows.The church’s ground plan is made up of three naves, separated by tall columns, which alternate with cruciform pillars. Inside, it is decorated with splendid capitals decorated with geometric elements; these are often different from one another, just like in other Romanic churches.
An important wood sculpture, which dates back to the mid-1200s and is from the Umbrian School, is located along the right nave and depicts the Madonna with Child. Above the main altar, there is a beautiful polychromatic wood crucifix from the 13th century by an unknown artist. Under the altar, there is a small, rectangular crypt with an ancient Roman tombstone and a lunette depicting Christ, which dates back to the 1500s and the Siena School.