The region of Auvergne is located in central France.  The region is surrounded by the regions of Bourgogne to its north, Centre to its northwest and west, Midi-Pyrenees to its southwest, Languedoc-Roussillon to its south and Rhone-Alpes to its east.  Auvergne is composed of four départements.  The département of Allier is located in the north, Cantal - in the southwest, Haute-Loire - in the southwest and Puy-de-Dome - in the region’s center.  The capital of Auvergne is the city of Clermont-Ferrand.  The region of Auvergne is found in France’s Massif Central.  The Massif Central is a large, somewhat arid upland area of south central France.  It covers about one-sixth of France’s area and, at Puy de Sancy, it reaches an elevation of 6188 feet.  Puy is the French word for a volcanic summit.  The Massif Central’s land area encompasses all, or part of the regions of Auvergne, which is located in the center of the Massif, Midi-Pyrénées and Limousin. Saint-Étienne, Clermont-Ferrand, and Limoges are major industrial centers. Besides heavy industry, the region supports sheep and goat raising, dairy farming, and coal and kaolin mining.  Several major hydroelectric facilities also are here, notably on the Cère, Dordogne, Lot, Tarn, and Truyère rivers. The Auvergne Mountains are the source of the Dordogne River, just south of Monts Dore in the region of Auvergne.  At first it flows southwest and then turns west, in the region of Limousin, département of Corrèze, for a total length of about 300 miles.  It combines with the Garonne River and enters the Gironde estuary near Bordeaux. The longest tributary of the Dordogne is the Isle River, which joins it at Libourne, the head of navigation for seagoing ships. The region of Auvergne consists of the former province of Auvergne.  The province took its name from the Arverni, a Gallic tribe whose leader, Vercingetorix, was defeated by Roman general Gaius Julius Caesar.  The Gallic capital, called Gergovia, was destroyed, by the Romans, and replaced by the colony of Augusto-Nemetum, which later became Clermont.  Auvergne was included in the newly conquered land, in southwestern France, that Caesar called Aquitaine.  In 475, the Romans ceded Auvergne to the Visigoths.  In 507, Auvergne was conquered by the Frankish king Clovis I.