Santa Maria della Pace is a co-cathedral basilica located in Largo Duomo in Campagna. In March 1925 Pope Pius XI elevated it to the dignity of a minor basilica. The building is structured on two levels:
The current co-cathedral basilica of Santa Maria della Pace is located on the upper level.
The chapel of the Beata Vergine del Carmelo and the Soccorpo are located on the lower level; both churches are accessible from a communicating corridor, across the Ponte dei preti over the Tenza river, in via Molinari. Construction began in 1634, it was consecrated in 1683 and, according to some, finished in 1750, but in fact it has always undergone changes with artistic and architectural contributions. For its construction, the materials of ancient buildings recovered in the municipal area were used. In 1750 the internal stuccos of the vaults were completed and in 1890 the interior was decorated in Baroque style by the Bolognese decorator Rinaldo Casanova. In 1968, Bishop Jolando Nuzzi, motivated by the provisions of the Second Vatican Council, removed all the 1890 embellishments and the eighteenth-century wooden choir, four side altars in polychrome marble, the bishop's throne in marble, the marble balustrade of the presbytery and had the high altar.
Since 1986, it has been the co-cathedral of the archdiocese of Salerno-Campagna-Acerno.