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Vexin(vĕksăN`), region of N France. It is mainly agricultural, with some industry in the valleys. By the Treaty of Saint-Clair-sur-Epte (911), the northernmost part (Vexin Normand) was assigned to Rollo of Normandy; the rest (Vexin Français) remained with the French crown. PontoisePontoise
, city (1990 pop. 28,463), capital of Val-d'Oise dept., N central France. It is the site of a technical school. The metallurgy and chemical industries are important. A "new town" called Cergy is south of the city.
..... Click the link for more information. , Gisors, and Les Andelys (see Andelys, LesAndelys, Les
, town (1993 est. pop. 8,580), in Eure dept., N France, Normandy, on the Seine. The twin communities of Grand-Andely and Petit-Andely form a commercial center, with a distillery, metalworks, glassworks, and silk and leather industries.
..... Click the link for more information. ) are the chief towns.