In the Paris area

La Défense

Val de Seine
La Défense (straddling the communes of Courbevoie, Puteaux, and Nanterre, 2.5 km/1.5 miles west of the city proper) is a key suburb of Paris and is one of the largest business centres in the world. Built at the western end of a westward extension of Paris' historical axis from the Champs-Élysées, La Défense consists mainly of business highrises. Initiated by the French government in 1958, the district hosts 3.5 million m² of offices, making it the largest district in Europe specifically developed for business. The Grande Arche (Great Arch) of la Défense, which houses a part of the French Transports Minister's headquarters, ends the central Esplanade around which the district is organised.
Plaine Saint-Denis (straddling the communes of Saint-Denis, Aubervilliers, and Saint-Ouen, immediately north of the 18th arrondissement, across the Périphérique ring road) is a formerly derelict manufacturing area which has undergone massive regeneration in the last 10 years. It now hosts the Stade de France around which is being built the new business district of LandyFrance, with two RER stations (on RER line B and D) and possibly some skyscrapers. In the Plaine Saint-Denis are also located most of France's television studios as well as some major movie studios.
Val de Seine (straddling the 15th arrondissement and the communes of Issy-les-Moulineaux and Boulogne-Billancourt to the south-west of central Paris) is the new media hub of Paris and France, hosting the headquarters of most of France's TV networks (TF1 in Boulogne-Billancourt, France 2 in the 15th arrondissement, Canal+ and the international channels France 24 and Eurosport in Issy-les-Moulineaux), as well as several telecommunication and IT companies such as Neuf Cegetel in Boulogne-Billancourt or Microsoft's Europe, Africa & Middle East regional headquarters in Issy-les-Moulineaux.