Fort de Roppe, also known as Fort Ney, was built between 1875 and 1877. It is part of the second ring of fortifications around the city of Belfort in northeastern France. This set of forts was built as part of the Séré de Rivières system and incorporated improvements to deal with the improvement in efficacy of artillery in the late 19th century.
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Coordinates 47°40'49.466" N 6°53'59.627" E