Cattedrale di Sant'Andrea/Duomo di Amalfi) is a 9th century Christian structure in the Piazza del Duomo, Amalfi, Italy. It is dedicated to the Apostle Saint Andrew. Predominantly of Arab-Norman Romanesque[citation needed] architectural style, it has been remodelled several times, adding Romanesque, Byzantine, Gothic, and Baroque elements. The cathedral includes the adjoining 9th century Basilica of the Crucifix.