Half-way along Via Roma stands the Palazzo di Provincia. From here Via del Duomo runs north, crossing the picturesque Via dei Mercanti, to the cathedral of San Matteo, built about 1080 in the time of Robert Guiscard and restored in 1768 and after 1945. A flight of steps leads up to an atrium with 28 ancient columns from Paestum and fourteen ancient sarcophagi. The magnificent bronze doors were made in Constantinople in 1099.
Above the doorway is a large half-length mosaic of St Matthew, of the Norman period. In the nave are two ambos (12th century) with rich Cosmatesque mosaic decoration, and near the right-hand one is an Easter candlestick decorated in similar style. At the end of the north aisle is the splendid tomb of Margaret of Anjou (d. 1412).
The pavement of the choir and the choir screens are decorated with mosaics. In the chapel to the right of the high altar is the tomb of Pope Gregory VII, who died in Salerno in 1085; in the apse of the chapel is a mosaic figure of the Archangel Michael (1260).
In the richly decorated crypt under the altar lie the remains of the Evangelist Matthew, brought here from Paestum.
In the Cathedral Museum in Salerno is a 12th century altar frontal, with ivory reliefs of Biblical scenes.