Gare du Nord is the busiest station of the Paris Métro, handling 95.6 million entries/exits a year and serving line 4 and line 5. It is connected to the SNCF's major station, Gare du Nord, which serves RER and Transilien commuter trains as well as interurban trains to northern France, Eurostar trains to London and Thalys trains to Brussels, Amsterdam and Cologne.
In November 1907 Line 5 was extended from Gare d'Orléans (now known as Gare d'Austerlitz) to Gare du Nord where the station was built on a reversing loop. On 21 April 1908 Line 4 was opened from Châtelet to Porte de Clignancourt through Gare du Nord. In 1942, the old Line 5 station was closed and replaced with a through station, in preparation for the extension to Église de Pantin. The part of the old loop that was not destroyed during the building of RER Line B in the 1970s together with connecting lines to Lines 2 and 4 under the Boulevard de Magenta and the Rue de Dunkerque are now used for driver training (USFRT). The length of platforms on Line 4 were extended from 75m to 90m in the 1960s during the upgrading of the line for rubber-tyre operations.
The church of Saint-Vincent-de-Paul is nearby.