Wielka Piaśnica

Wielka Piaśnica is a village in the administrative district of Gmina Puck, within Puck County, Pomeranian Voivodeship, in northern Poland. It lies approximately 14 km west of Puck and 46 km north-west of the regional capital Gdańsk.

World War II
After the 1939 Invasion of Poland, German SS from Danzig (Gdańsk) and local German Selbstschutz members executed about 12,000 civilians, mainly Polish and Kashubian intelligentsia from the Pomeranian Voivodeship, in the Darżlubska forest next to the village. Among the victims were approximately 1,200 mentally ill persons from local hospitals, killed in the course of the forced euthanasia policy dubbed Action T4.

The mass executions began in October 1939 and lasted until April 1940. An exhumation of mass graves was carried after World War II in 1946. Out of total number of 35 graves, 30 were localised of which 26 were exhumed. Only 305 bodies (in two mass graves) were found, the rest of the bodies were burnt by Germans in August–September 1944. Sonderkommandos (forced prison labourers) from Stutthof concentration camp were used to cover up the tracks and were later executed.