Denfert-Rochereau station

Gare de Denfert-Rochereau is a railway station in Paris. It was one of the first stations of the French railway network, and is still in use as a station of Paris' RER line B.

The station was built from 1842 and opened on 7 June 1846 as the Gare d'Enfer, after the nearby Place d'Enfer, itself named after the Barrière d'Enfer. The station building had a circular shape as it possessed a rail loop. Indeed, the station was the Parisian terminus of a line from Sceaux.

Source: Wikipedia