Lager Sylt
It was organised by the Schutzstaffel - SS-Baubrigade I–which was first under supervision of the Sachsenhausen concentration camp; and since mid-February 1943 ran under the Neuengamme camp in northern Germany–near the old telegraph tower at La Foulère.  It was used by the Nazi Organisation Todt, a forced labour programme, to build bunkers, gun emplacements, air-raid shelters, and concrete fortifications.