The Church of St. Matthew the Apostle is the Mother Church of Montenero di Bisaccia. In fact, it is the oldest Church of the village and for years it was the only one. Located in the city center, just few steps from the City Hall, it preserves the bust of St. Matthew that on September 21st is brought to procession along the streets of the village.
The Church is a modern building rebuilt in the early 20th century. The ex novo building is located on the remains of the previous Church which is of the 11th century. The facade is characterized by the presence of three portals: the principal and two smaller that allow access to the building by lateral staircases. The left side facade has a lower coverage than the central one and is adorned by four longitudinal windows. The upper part of the transept hosts, in the center, a large double-arched window, over which there is a rose window. Instead, the opposite facade has preserved only the initial part of the aisle, as the rest of the facade that has been incorporated into a modern building that houses parochial locals. The back of the Church has a semicircular profile. The three internal naves are divided by pillars. The left side nave ends with a marble altar dating to the second half of the 18th century. The presbytery houses the principal altar, raised slightly two steps above the classroom floor. Inside, the Church preserves an 18th-century wooden organ, an altar in polychrome marble and the silvery bust of St. Matthew. In the final part of the right side of the Church is located the bell tower with hexagonal base. Inside, the unseen cell is closed by six windows.
The Church of St. Matthew the Apostle is the largest in Montenero di Bisaccia and seems that existed already in the 14th century, while the present Church was built in the first half of the 20th century. Of great size, it is beautiful and majestic. Nearby there are the canonical Church and an oratory for pastoral activities.