Frederick II, Duke of Lorraine, was a nobleman who ruled from 1206 until his death in 1213. He belonged to the House of Lorraine, a prominent family in medieval Europe. Frederick was known for his efforts to strengthen the duchy and maintain its independence amid the political complexities of the time. During his reign, Frederick II faced challenges from neighboring territories and worked to secure alliances. He was also involved in the broader conflicts of the Holy Roman Empire, which influenced the dynamics of power in the region. His leadership contributed to the legacy of the Duchy of Lorraine in European history.