The cathedral of Casertavecchia was built between 1113 and 1153 and is the dominant structure of the old village. Its architecture reflects the cultural mixing that characterised Norman southern Italy: the basic Romanesque structure is enriched with interlaced arches and decorative stonework that show clear Arab-Sicilian influence, while the octagonal lantern tower above the crossing adds a further layer of complexity. The result is unusual and striking.
The interior is relatively plain after the richness of the exterior, with a nave of ancient columns salvaged from earlier structures. The campanile, connected to the main building by a pointed arch spanning the street, is an especially picturesque element. The cathedral is still in active use and is the focal point of Casertavecchia's summer festival season. Entry is free and the building is generally open during daylight hours.