The Empire may have collapsed in Return of the Jedi, but evil still lurks in the universe, and it needs a headquarters. This is the construction blueprint for the interior of the Starkiller Base, seat of the First Order’s power. (It was known on-set and in production designs by the codename “Evil Castle.”) In The Force Awakens, it’s a monstrously huge structure, full of twisting hallways, long corridors, and a central control room. But in real life, the mostly wood-and-plastic set occupied a single soundstage at Pinewood Studios in London—and movie magic was the Force that turned it into the new Death Star.