Duke Leopold of Austria, also known as Leopold VI, was a prominent nobleman in the 12th century. He was a member of the Babenberg dynasty and ruled as Duke of Austria from 1095 until his death in 1136. Leopold is known for his efforts to expand and consolidate his territory, as well as for his support of the Holy Roman Empire. Leopold VI was also involved in the Crusades, participating in the Second Crusade. His reign is marked by the establishment of Vienna as an important center of trade and culture. He is remembered for his contributions to the development of Austria during a pivotal time in its history.