Leopold I, Duke of Austria

Leopold I the Glorious (c. 1290–1326), third son of Albert I, was co-duke of Austria and Styria with his brother Frederick the Fair from 1308. He administered Further Austria, pursued his father's murderers, and backed Frederick's claim to the German crown in the 1314 double election.

In 1315 his knights were routed by the Swiss Confederates at the Battle of Morgarten. After Frederick was captured at Mühldorf in 1322, Leopold fought on and surrendered the imperial regalia in a failed bid for his release. He died at Strasbourg in 1326.