@Walter Hinteler,
Buchenwald is of course "famous" - e.g. because of the diary of Erwin Ding-Schuler (surgeon, head of
Waffen-SS Hygiene Institute [SS-hygiene institute]), where he described detailed the performed experiments on inmates of the Buchenwald concentration camp.
And for the time between 1945 and 1953, Special Camp 2 Buchenwald, the largest Gulag (until 1950) and until 1953 GDR special camp. (7,000 deaths unti 1950)