Sonnenstein Euthanasia Centre

The Sonnenstein Euthanasia Clinic was a Nazi euthanasia or extermination centre located in the former fortress of Sonnenstein Castle near Pirna in eastern Germany, where a hospital had been established in 1811.

In 1940 and 1941, the facility was used by the Nazis to exterminate around 15,000 people in a process that was labelled as euthanasia. The majority of victims were suffering from psychological disorders and intellectual disability, but their number also included inmates from the concentration camps. The institute was set up after the beginning of the Second World War as part of a Reich-wide, centrally coordinated and largely secret programme called Action T4 for the "Elimination of life unworthy of life" or the killing of what the Nazis called "dead weight existences". Today, the Pirna Sonnenstein Memorial Site stands to commemorate the victims of these crimes.

Source: Wikipedia