Roman Catholic Diocese of Carcassonne-Narbonne Tags: Clerical Administrative Region, Diocese.The Roman Catholic Diocese of Carcassonne is a diocese of the Latin Rite of the Roman Catholic church in France. The diocese comprises the entire department of Aude. It is suffragan to the archdiocese of Montpellier. thumbnail point area (km2) 6.313e+09 country France Established Name Changed: 14 June 2006 jurisdiction Diocese patron Michael (archangel), Nazarius and Celsus province Roman Catholic Archdiocese of Montpellier latitude 43.2156 longitude 2.35333 Learn more... Loading...