Wikipedia
Klucznik
Klucznik is a village in the administrative district of Gmina Barczewo, within Olsztyn County, Warmian-Masurian Voivodeship, in northern Poland. It lies approximately south-east of Barczewo and east of the regional capital Olsztyn.
While traditionally Prussian, with the Second Peace of Thorn in 1466 the area became part of the Kingdom of Poland until 1772; 1772-1945 Kingdom of Prussia and Germany ( East Prussia).
The village has a population of 80.