Leopold III, Duke of Austria

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Duke Leopold III of Austria, Duke of Inner Austria (November 1, 1351, Vienna – July 9, 1386, Sempach) from the Habsburg family was a Duke of Austria, Styria and Carinthia. He 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 Tirol, and was jointly charged with the rule of the Habsburg lands with Albert after Rudolf's death. However, in 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, Tirol 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.

He was succeeded by eldest his 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.
Preceded by:
Rudolf IV Duke of Styria, Carinthia, Carniola,
ruler of Tyrol and of Further Austria
originally also Duke of Austria,
but split the territories with Albert III in 1379 Succeeded by:
William

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