view of the barrage vauban from the ponts couverts, a medieval bridge defensive in pink vosges sandstone, strasbourg, france

039 1686-1690 1888 1968 16861690 alsace ancient architectural architecture barrage bridge bridges building canal casts city cityscape commanderie couverts covered dam defensive drawbridges engineer erected europe exhibited fortification fortifications france frankhauser french georges great historic history ill internal jacques jeanarp landmark lock medieval outdoor panoramic passage petite pink place plaster pont ponts public quartierblanc river roof saintjea sandstone siege staircases statues strasbourg structure tarade terrace upstream urban vauban view vosges