Roman Catholic Diocese of Biella Tags: Clerical Administrative Region, Diocese.The Diocese of Biella (Latin: Dioecesis Bugellensis) is a Roman Catholic ecclesiastical territory in northern Italy created in 1772. It is a suffragan of the Archdiocese of Vercelli. Biella is a city in Piedmont. thumbnail area (km2) 9e+08 country Italy Established 1 June 1772 province Roman Catholic Archdiocese of Vercelli Learn more... Loading...