Charleroi is a city and  a municipality of Wallonia, located in the province of Hainaut, Belgium. By 1 January 2008, the total population of Charleroi was 201,593. The metropolitan area, including the outer commuter zone, covers an area of 1,462 square kilometres (564 sq mi) with a total population of 522,522 by 1 January 2008, ranking it as the 5th most populous in Belgium after Brussels, Antwerp, Liège, and Ghent. The inhabitants are called Carolorégiens or simply Carolos. Further infos on wikipedia.