Learn about Himmler's cult centre of the SS, Wewelesburg Castle. In 1936, Himmler acquired a 17th century castle that he planned to turn into the spiritual home of the SS. He embarked on a massive renovation project, with all work to be carried out by concentration camp inmates. The evidence of the work he did can still be found at the castle, as Patrick Bury discovers when he investigates the moat, the Hall of the Supreme Leaders, and the Crypt.