Hadamar Euthanasia Centre

The Hadamar Euthanasia Centre, known as the "House of Shutters", was a psychiatric hospital located in the German town of Hadamar, near Limburg in Hessen, from 1941 to 1945.Beginning in 1939, the Nazis used this site as one of six for the T-4 Euthanasia Programme, which performed mass sterilizations and mass murder of "undesirable" members of German society, specifically those with physical and mental disabilities. In total, an estimated 200,000 people were killed at these facilities, including thousands of children. These actions were in keeping with the eugenics ideas about racial purity developed by National Socialist ideologues. While officially ended in 1941, the programme lasted until the German surrender in 1945. Nearly 15,000 German citizens were transported to the hospital and died there, most killed in a gas chamber. In addition, hundreds of forced labourers from Poland and other countries occupied by the Nazis were killed there.

Source: Wikipedia