The Cathedral of Isernia, also known as Cattedrale di San Pietro Apostolo, is a prominent Roman Catholic church located in the city of Isernia, Italy. It was originally built in the 11th century and has undergone several renovations over the years. The cathedral features a blend of architectural styles, including Romanesque and Gothic elements, and is known for its beautiful façade and intricate interior. Inside, the cathedral houses several important artworks and religious relics, making it a significant site for both worship and tourism. The cathedral's bell tower is a notable landmark in the city, offering stunning views of the surrounding area. Visitors often admire its historical significance and artistic beauty.