Ferry I of Lorraine was a nobleman who ruled as the Duke of Lorraine from 1346 until his death in 1355. He was a member of the House of Lorraine and played a significant role in the political landscape of medieval France. His reign was marked by efforts to strengthen the duchy and maintain its independence amid the conflicts of the time. Ferry I was known for his military leadership and alliances, particularly during the Hundred Years' War. He sought to protect his territory from external threats and fostered relationships with neighboring regions. His legacy includes contributions to the development of Lorraine as a distinct political entity in Europe.