Amalfi Cathedral is a 9th-century Roman Catholic structure in the Piazza del Duomo, Amalfi, Italy. It is dedicated to the Apostle Saint Andrew. Predominantly of Arab-Norman Romanesque architectural style, it has been remodeled several times, adding Romanesque, Byzantine, Gothic, and Baroque elements. The cathedral includes the adjoining 9th century Basilica of the Crucifix. Leading from the basilica are steps into the Crypt of St. Andrew.