Question: Leopold VI, was the Duke of Syria from 1194, and had the title of which medieval principality, of the Holy Roman Empire, from 1198 to his death in 1230?
Sentence (from "Duchy of Austria"): In 1453, the archducal title of the Austrian rulers, invented by Duke Rudolf IV in the forged "Privilegium Maius" of 1359, was officially acknowledged by the Habsburg emperor Frederick III.
Relevant evidence: No