The Duomo of Amalfi, the main Catholic place of worship in the city, is a structure dating back to the ninth century with architectural features ranging from Romanesque to Baroque to Rococo. The cathedral is dedicated to the apostle Saint Andrew.

Predominantly of Arab-Norman Romanesque architectural style, it has been repeatedly altered, adding Romanesque, Byzantine, Gothic and Baroque elements. The cathedral includes the adjoining Basilica of the Crucifix also dating from the ninth century. Also there you can find the Crypt of Sant'Andrea and the famous Cloister of Paradise.

The cathedral was built next to the oldest Basilica which in turn was built on the ruins of a temple, when the Maritime Republic began to establish itself as a commercial power. It was completely renovated in 1203, in the Arab-Norman forms introduced by the conquerors. Remodelled around 1570, it was also rebuilt after 24 December 1861 under the action of a strong wind, a stretch of the facade’s crown, in a poor state of preservation, fell breaking through one or two times of the atrium below.

The favorable opinion to the stylistic restoration of the Board of Fine Arts meant that, for a slight damage, the layers on the facade (Renaissance, Baroque, etc.) were erased, rebuilding the cathedral in the style of the architect Lorenzo Casalbore, who demolished the famous porch, the capitals, the frames, the same plaster and the bases and pilasters of the eighteenth century.