Duke Frederick of Austria, also known as Frederick IV, was a prominent nobleman in the late 14th and early 15th centuries. He ruled over the Duchy of Austria and was a member of the House of Habsburg, a powerful family that played a significant role in European politics. His reign was marked by territorial conflicts and efforts to consolidate power within the region. Frederick was involved in various military campaigns, including conflicts with the Kingdom of Hungary and other neighboring territories. His leadership contributed to the Habsburgs' growing influence in Central Europe, setting the stage for future generations of the family to expand their dominion across the continent.