The Duchy of Lorraine was a historical region in northeastern France, established in the early Middle Ages. It was part of the larger Holy Roman Empire and played a significant role in European politics. The duchy was known for its rich resources and strategic location, which made it a contested area during various conflicts, including the Thirty Years' War. In 1766, the Duchy of Lorraine was annexed by France, ending its status as an independent duchy. The region is now part of the modern-day Grand Est administrative region of France. Its capital, Nancy, is famous for its beautiful architecture and historical significance.