Lille is a city in northern France. It is the principal city of the Lille Métropole, the fourth-largest metropolitan area in the country behind those of Paris, Lyon and Marseille. Lille is situated on the Deûle River, near France's border with Belgium. It is the capital of the Nord-Pas de Calais region and the prefecture of the Nord department. A former major textile manufacturing centre, Lille forms the heart of a larger conurbation, regrouping Lille, Roubaix, Tourcoing and Villeneuve d'Ascq, which is France's 4th-largest urban conglomeration with a 1999 population of over 1.1 million.