The Wewelsburg concentration camp was the smallest autonomous main camp within Germany. Prior to this, it was a subcamp from Sachsenhausen. Reichsführer-SS Heinrich Himmler used it for his personal building project "Wewelsburg", a renaissance castle to become a large ideological-religous center for the SS. He exploited concentration camp labor for the necessary renovations and expansion of the castle, following the principle "Vernichtung durch Arbeit" (destruction through work). He had to not only camouflage the camp from the Allies, but also from the SS-Business Administration Main Office (WVHA), who did not regard the project as "vital to the war construction work" and could cut off economic support. When US troops arrived in the city on April 2, 1945, they were surprised to find a concentration camp there.
Wewelsburg is part of a series of journeys that I'm undertaking to photograph the blue skies precisely above the (last known) location of every single one of the 1,075 concentration camps that have ever existed, as part of an photography/book/installation project called The Blue Skies Project. The project has proven quite immense and almost impossible to hold on to single-handedly – with staggering logistics to match – but I'm hanging in there.