Not to be confused with Grand-Couronne.
The Grande Couronne (Greater Crown, i.e. Outer Ring) includes the towns of the metropolitan area part of the other 4 departments of Île-de-France not bordering with Paris. They are Seine-et-Marne (77), Yvelines (78), Essonne (91) and Val-d'Oise (95). The latter three departments formed the Seine-et-Oise department until this was disbanded in 1968. The city of Versailles is part of this area.
Read more about this topic: Paris Aire Urbaine