Roman Catholic Diocese of Eisenstadt Tags: Clerical Administrative Region, Diocese.The Diocese of Eisenstadt (Latin: Dioecesis Sideropolitanus) is a diocese located in the city of Eisenstadt in the Ecclesiastical province of Vienna in Austria. The episcopal seat is in Eisenstadt Cathedral. thumbnail Established August 15 1960 jurisdiction Diocese patron Martin of Tours province Roman Catholic Archdiocese of Vienna territory Burgenland Learn more... Loading...