Diocese of Leoben

Map of Austria showing the Diocese of Leoben

The Diocese of Leoben was an Austrian Roman Catholic diocese which covered parts of Styria previously in the Archdiocese of Salzburg. It was founded on 28 January 1785 but after the death in 1800 of its first and only bishop, its incorporation into the Diocese of Seckau was ordered in 1804 by Holy Roman Emperor Francis II. Although the bishops of Seckau administered it from 1808, Papal consent to the unification was not given until 1859.