The Castle of the Teutonic Order in Malbork, located in the Polish town of Malbork, is the largest castle in the world measured by land area. It was originally built by the Teutonic Knights, a German Roman Catholic religious order of crusaders, in a form of an Ordensburg fortress. In 1466, both castle and town became part of Royal Prussia, a province of Poland.

Stutthof was a Nazi German concentration camp built in a secluded, wet, and wooded area near the small town of Sztutowo 34 km (21 mi) east of the city of Gdańsk in the former territory of the Free City of Danzig. The camp was set up around already existing structures after the invasion of Poland in World War II, used for the imprisonment of Polish intelligentsia. More than 85,000 victims died in the camp out of as many as 110,000 inmates deported there.