Regarding Gross-Rosen, as mentioned in this film: KZ [Concentration camp] Gross-Rosen [now modern day Rogoznica, Lower Silesian Voivodeship, Poland] concentration camp was functional by the summer of 1940 until 14th February 1945, with an estimated 40,000 captives losing their lives there. KZ Gross-Rosen [German name: Konzentrationslager Groß-Rosen], too, had the slogan "Arbeit Macht Frei" ["Work sets you free" or "Work makes one free"] at its entrance.