The Polish Memorial in Palmiry was established in 1948. It is located in a forest near the village of Palmiry (Czosnów) within the Kampinos National Park in the Masovian Voivodeship. During the German occupation of Poland between 1939 and 1943, the Gestapo and SS units carried out secret mass shootings of the Polish civilian population here. The memorial is located near the former mass graves.