The building on Lorenzstraße. Who was Mr. Lorenz, what is Hallenbau A, what happened here?! Patronenwald explores the history of the munitions factory, the building that has been home to the HfG, the ZKM, and the Municipal Gallery since the 1990s. In his documentary film, Sebastian Drost explores the history of the factory and the “foreign workers.” Using authentic material—including writings, regulations, and decrees from the General State Archives in Karlsruhe and interviews with former forced laborers—he creates an oppressive document of Nazi practices based on an exemplary case study.