Leopold III Habsburg Duke of Austria
- Born: 1 Nov 1351, Wien, Wien, Austria
- Marriage: Viridis Visconti on 23 Feb 1365
- Died: 9 Jul 1386, Battle of Sempach, Sampach, Sursee, Lucerne, Switzerland at age 34
Duke Leopold III of Austria from the Habsburg family, was Duke of Austria from 1365 to 1379, and duke of Styria and Carinthia (Inner Austria) in 1365\endash 1386.
Born in Vienna, Leopold was a younger son of Duke Albert II, and younger brother of the Dukes Rudolf IV the Founder and Albert III. He first was the administrator of Tyrol, and was jointly charged with the rule of the Habsburg lands with Albert after Rudolf's death. However, by the Treaty of Neuberg of September 9, 1379, he became the exclusive ruler of Styria (including Wiener Neustadt), Carinthia, Carniola, the Windish March, Gorizia, the Habsburgs' possessions in Friuli, Tyrol and Further Austria. In 1368 he acquired Freiburg im Breisgau, in 1375 Feldkirch and in 1382 Trieste.
However, his attempts to expand his position in Switzerland and Swabia failed, when he died in the Battle of Sempach in 1386.
Family and children
He married 23 February 1365 to Viridis Visconti (1350\endash 1414), daughter of Barnabò Visconti, Lord of Milan, and had the following children:
3. Ernest the Iron
5. Elisabeth (1378\endash 1392)
6. Katharina (1385\endash ?) Abbess of St. Klara in Wien
He was succeeded by his eldest son William. Other sons included Leopold, future Duke of Further Austria, Ernest the Iron, future Duke of Inner Austria, and Frederick, future Duke of Further Austria.
Leopold married Viridis Visconti on 23 Feb 1365. (Viridis Visconti was born in 1350 and died in 1414.)