The Métropole du Grand Paris (, "Metropolis of Greater Paris") is an Établissement public de coopération intercommunale, or public establishment for inter-communal cooperation, an administrative structure for cooperation between the City of Paris and its nearest suburbs. The region came into existence on January 1, 2016 and includes the City of Paris, the communes, towns of the three departments of the inner suburbs; Hauts-de-Seine, Seine-Saint-Denis and Val-de-Marne; plus seven communes in the outer suburbs, including Argenteuil in Val d'Oise and Paray-Vieille-Poste in Essonne, which were added to include major airports. Grand Paris will cover 814 square kilometers and will have a population of 6.945 million persons.