Bas-Rhin is a département in Alsace which is a part of the Grand Est super-region of France. The name means 'Lower Rhine', referring to its lower altitude among the two French Rhine departments: it is downstream of the Haut-Rhin department. Both belong to the European Upper Rhine region. It is, with the Haut-Rhin, one of the two departments of the traditional Alsace region which until 1871, also included the area now known as the Territoire de Belfort.