The Cathedral of San Matteo in Salerno, or Cathedral of Salerno, was founded by Roberto il Guiscardo and consecrated by Pope Gregory VII, officially inaugurated in March 1084.

The present structure dates back to the earthquake of 5 June 1688, when it was completely rebuilt. The main entrance has been modified, its courtyard is surrounded by a covered passage supported by twenty-eight simple columns with arches and a series of Roman tombs around the walls.

On the southern side of the cathedral is the bell tower that dates back to the 12th century. The cathedral of Salerno has a plan articulated in a longitudinal body with three naves with a horizontal one, the transept, with three apses and four porches. The first element of novelty is given by the shape of the crypt classroom space punctuated by columns and with the apses in correspondence with those of the upper transept.

The crypt holds the mortal remains of Saint Matthew. Legend has it that the relics were brought to Salerno by Gisulf I in the tenth century and later in 1081, when the new cathedral dedicated to the evangelist was built, they were laid in the crypt intended to keep them.