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 during a time of political turmoil. During his reign, Frederick II faced challenges from neighboring territories and the growing power of the Holy Roman Empire. He was involved in various conflicts, including disputes over land and influence. His leadership contributed to the development of the region, laying the groundwork for future rulers of Lorraine.