Roman Catholic Diocese of Parma Tags: Clerical Administrative Region, Diocese.The Italian Catholic Diocese of Parma (Latin: Dioecesis Parmensis) has properly been called Diocese of Parma (-Fontevivo) since 1892. Its see is Parma Cathedral. It is a suffragan of the Archdiocese of Modena-Nonantola. thumbnail area (km2) 2.1e+09 country Italy Established 4th Century ( years ago) province Roman Catholic Archdiocese of Modena-Nonantola Learn more... Loading...