Châtelet station is a station of the Paris Métro and Île-de-France's RER commuter rail service, located in the centre of medieval Paris, on the border between the 1st and 4th arrondissements. It serves RER A, B and D, as well as lines 1, 4, 7, 11, and 14 of the Paris Métro; it is the southern terminus of Line 11. The station is made up of two parts connected by a long corridor: lines 7 and 11 under the Place du Châtelet and the Quai de Gesvre, next to the Seine; lines 1, 4 and 14 towards Rue Saint-Denis and the Rue de Rivoli.