The Duchy of Champagne was a historical region in northeastern France that played a significant role during the Middle Ages. Established in the 10th century, it became a center for trade and commerce, particularly known for its fairs, which attracted merchants from across Europe. The duchy was also influential in the development of the French economy and culture. Champagne was ruled by a series of powerful dukes, with the most notable being Henry I of Champagne. The region was known for its vineyards, which later contributed to the production of the famous Champagne wine. The duchy eventually became part of the Kingdom of France in the 15th century.