Leopold I, Duke of Austria

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Leopold I (born August 4, 1290 in Vienna, died February 28, 1326 in Strassburg) was a Duke of Austria and Styria from the Habsburg family. He was the third son of King Albert I and brother of Duke Frederick I the Handsome (III as King of the Romans). After the death of his parents, he became the head of the House of Habsburg. As the administrator of Further Austria, he incurred a decisive loss against the Swiss in the Battle of Morgarten in 1315. He also struggled to have his brother Frederick elected as King. After Frederick's capture by King Louis the Bavarian after the Battle of Mühldorf he struggled for his release.

Leopold married Catherine of Savoy (1284-1336), daughter of Amadeus V, Count of Savoy in 1315. They had two daughters: Katherine (1320-1349) and Agnes (1321~26-1392).