Duroc is a station on lines 10 and 13 of the Paris Métro on the borders of the 6th, 7th and 15th arrondissement. The line 10 station was opened on 30 December 1923 as part of the first section of the ligne circulaire interieur (inner circular line) from Invalides to Croix Rouge. This line was planned by Fulgence Bienvenüe to connect the city's six main railway stations, with Duroc presumably intended to serve the Gare de Montparnasse, although it is 500 metres away.