Nowa Kościelnica is a village in the administrative district of Gmina Ostaszewo, within Nowy Dwór Gdański County, Pomeranian Voivodeship, in northern Poland. It lies approximately 5 km north-east of Ostaszewo, 10 km west of Nowy Dwór Gdański, and 26 km south-east of the regional capital Gdańsk. Before 1772 the area was part of Kingdom of Poland, 1772-1919 Prussia and Germany, 1920-1939 Free City of Danzig, 1939 - February 1945 Nazi Germany. For the history of the region, see History of Pomerania. Nowa Kościelnica is famed for its two Mennonite houses, which date back hundreds of years. They are considered to be the oldest standing houses in Poland.