The French word "banlieue" simply means the extension of the city out of its historical borders. Neuilly-sur-Seine, Saint-Denis, Aubervilliers, Issy-les-Moulineaux, Nanterre, Bobigny, Courbevoie, Montreuil, Créteil, La Courneuve. All those places are simply districts of Paris. In any other western country, it would be part of the city. In any western country except in France, where the borders of Paris have been enlarged only once since the revolution in 1789 (Despite the city being 20 times bigger than then). There are 36,000 municipalities in France. That's as many as in all the 24 other members of the EU together. To let you compare, there are 8,000 municipalities in Germany, 8,000 also in Spain. French municipality borders are totally outdated. We should have 4 times less municipalities.