The Diocese of Nola (Latin: Dioecesis Nolana) is a Latin diocese of the Catholic Church in Italy, suffragan of the Archdiocese of Naples. Its seat is the Campanian city of Nola, now a suburb of Naples. Its cathedral is dedicated to the Assumption (Italian: Basilica Cattedrale di Maria SS Assunta). The dedication was originally to Saint Stephen the Protomartyr, but after the second reconstruction the dedication was changed to the Assumption. It is traditionally credited with the introduction of the use of bells into Christian worship.