KZ9 - Lager of extermination is a 1977 film directed by Bruno Mattei.The film is the second and last Nazisploitation of Mattei, a genre that mixes erotic elements with the theme of Nazism; this fits into the thread of the Nazis-porno all'Italiana, together with Salò or the 120 days of Sodom by Pier Paolo Pasolini, Salon Kitty by Tinto Brass and Il portiere di nuit by Liliana Cavani. The film is inspired by the figure of the angel of death, Dr Josef Mengele, whose film narrates the deeds in a crude way and condemning his work.Mattei had problems with censorship, and like the previous Private House for SS was welcomed coldly by Italian critics because of the themes discussed.On October 29, 2004, it was broadcast during the "Joe D'Amato Horror Festival".