Amalfi Cathedral is a medieval Roman Catholic cathedral in the Piazza del Duomo, Amalfi, Italy. It is dedicated to the Apostle Saint Andrew whose relics are kept here. Formerly the archiepiscopal seat of the Diocese of Amalfi, it has been since 1986 that of the Diocese of Amalfi-Cava de' Tirreni.
Begun in the 9th and 10th centuries, it has been added to and redecorated several times, overlaying Arab-Norman, Gothic, Renaissance, Baroque elements, and finally a new 19th century Norman-Arab-Byzantine facade. The cathedral includes the adjoining 9th-century Basilica of the Crucifix. Leading from the basilica are steps into the Crypt of St. Andrew.