Nicastro Cathedral (Italian: Duomo di Nicastro; Cattedrale dei Santi Pietro e Paolo) is a Roman Catholic cathedral dedicated to Saints Peter and Paul in the town of Nicastro, now part of the city of Lamezia Terme, in the province of Catanzaro, in the Calabria region of southern Italy. It was previously the episcopal seat of the Diocese of Nicastro and when the diocese changed its name to the Diocese of Lamezia Terme, remained its cathedral.