Leopold I, called The Glorious, was Duke of Austria and Styria – as co-ruler with his elder brother Frederick the Fair – from 1308 until his death. A member of the House of Habsburg, he was the third son of Albert I of Germany and Elisabeth of Gorizia-Tyrol, a scion of the Meinhardiner dynasty.

The Duchy of Styria was a duchy located in modern-day southern Austria and northern Slovenia. It was a part of the Holy Roman Empire until its dissolution in 1806 and a Cisleithanian crown land of Austria-Hungary until its dissolution in 1918.