On 2nd September 1939 Germans opened first Concentration Camp (nothing to do with concentrating a lot of with dying) in Stutthof. As Germans just don’t want to waste anything – even dead corps – they’ve made soap out of it.
German death camp – Stutthof, Soap production from the bodies of victims
WWII German Death Camps Map – Wikipedia
This map shows all German extermination camps (or death camps), most major German concentration camps, German labor camps, German prison camps, ghettos, major deportation routes and major massacre sites. On map “Poland” in brackets indicates occupied teritory.
Interior of gas chamber, German concentration camp Stuthoff – Wikipedia