Sachsenhausen () or Sachsenhausen-Oranienburg was a Nazi concentration camp in Oranienburg, Germany, used from 1936 to the end of the Third Reich in May 1945. It mainly held political prisoners throughout World War II. Prominent prisoners include Joseph Stalin's oldest son Yakov Dzhugashvili, assassin Herschel Grynszpan, Paul Reynaud the penultimate Prime Minister of France, Francisco Largo Caballero Prime Minister of the Second Spanish Republic during the Spanish Civil War, the wife and children of the Crown Prince of Bavaria, Ukrainian nationalist leader Stepan Bandera, and several enemy soldiers and political dissidents.