In October and November 1939, in a forest nearby Roznowice, about fourty kilometres northwest of Poznan, Nazis buried about 1000 patients from the mental hospital in Owinska. The bodies were buried in mass graves and had either been killed in Posen- fort VII gas chamber or shot directly at the forest site. In some cases a mobile gas wagon was used. In charge of the killings was a unit called Sonderkommando Lange. Kommando Lange had the task of killing mentally handicapped people where ever they could be found in Wartheland (occupied area in western Poland). Especially from psychiatric hospitals where doctors and nurses cooperated with Lange in the murder process.

Current status: Monument (2015).

Location: 52°42'24.78"N 16°50'53.32"E

Get there: Car.

My comment:

An outdoor museum with informtion boards and several graves and monuments. Its location far from the nearest road makes it quiet and peaceful to visit.

Follow up in books: Friedlander, Henry: The Origins of Nazi Genocide – From euthanasia to the final solution (1995).