Austria, Duchy and Archduchy / Duke Albert I and Duke Rudolf III (King of Bohemia as Rudolf I), joint rule

Rudolf of Habsburg (Czech: Rudolf Habsburský), a member of the House of Habsburg, was Duke of Austria and Styria (as Rudolf III) from 1298 as well as King of Bohemia and titular King of Poland (as Rudolf I) from 1306 until his death.

Rudolf was the eldest son of Duke Albert I of Austria and his wife Elizabeth of Gorizia-Tyrol, thereby the grandson of King Rudolf I of Germany. He ruled Austria jointly with his father until his death, after which Albert I continued to rule alone.