Champagne (shäNpäˈnyə) [key], historic region and former province, NE France, consisting mainly of Aube, Marne, Haute-Marne, and Ardennes depts., which form that modern region of Champagne-Ardenne. The Champagne region is almost, but not fully, coextensive with the former provinces of Champagne and Brie. Abutting in the west on the Paris basin, Champagne is a generally arid, chalky plateau, cut by the Aisne, Marne, Seine, Aube, and Yonne rivers. Agriculture, except in the Ardennes dept., is mostly confined to the valleys. Crests divide the plateau from northwest to southeast into several areas. In the east, bordering on Lorraine, is the so-called Champagne Humide [wet Champagne], largely agricultural, and the Langres Plateau. In the center is the Champagne Pouilleuse [Champagne badlands], a bleak and eroded plain, traditionally used for sheep grazing; however, Troyes and Châlons-en-Champagne, its principal towns, are located in fertile valleys and are centers of the wool industry. A narrow strip along the westernmost crest of Champagne is extremely fertile. The area around Reims and Epernay and the SE Aube dept. furnishes virtually all of the champagne wine exported by France. Reims and Troyes are the center of the area's textile industry. The St. Dizier area is a metallurgy center. Other fertile districts are around Rethel and Sens. Champagne's central and open location made it a major European battlefield from the invasion by Attila's Huns, whom Actius defeated at Châlons in 451, to World War I, which left vast areas scorched. Yet the same geographic position gave the towns of Champagne a commercial prosperity in direct contrast to the bleakness of the countryside. In the Middle Ages, Champagne was famous for its great fairs, held at Troyes (the capital), Provins, Lagny-sur-Marne, and Bar-sur-Aube. Merchants from all over western Europe met six times each year. Their laws regulating trade had a profound influence on later commercial customs; the troy weight for precious metals is still used. Prosperity was accompanied by cultural brilliance, culminating in the work of Chrétien de Troyes and in the Gothic cathedral at Reims. The county of Champagne had passed to the counts of Blois in the 11th cent.; the main branch held Champagne after 1152. The domain was greatly extended; large parts of France, including Blois, Touraine, and Chartres, were dependent upon the Champagne counts. Most famous of the counts was Thibaut IV, who in 1234 inherited the crown of Navarre from his uncle Sancho VII. In 1286 the daughter and heir of Henry III, Count of Champagne and King of Navarre, married Philip IV of France. When their son ascended the French throne (as Louis X) in 1314, Champagne was incorporated into the royal domain. The bishoprics of Reims and Langres were added later. Champagne declined in prosperity thereafter; however, the enduring popularity of its sparkling wine, which was developed at the end of the 17th cent., somewhat revitalized its economy. More recently, efforts have been made to reforest the area and reclaim it from erosion.