The Babenberg family was a noble dynasty that played a significant role in the history of Austria from the 10th to the 13th centuries. They were instrumental in the establishment of the Duchy of Austria and contributed to the region's political and cultural development. The Babenbergs are known for their efforts in expanding their territory and strengthening their influence in Central Europe. One of the most notable members of the Babenberg family was Leopold I, who became the first Duke of Austria in 1156. Under his leadership, the Babenbergs fortified their power and established important cities, such as Vienna. The dynasty ended with the death of Frederick II in 1246, leading to a power vacuum that eventually allowed the Habsburg family to rise to prominence.