Stutthof was a Nazi concentration camp established by Nazi Germany in a secluded, marshy, and wooded area near the village of Stutthof (now Sztutowo) 34 km (21 mi) east of the city of Danzig (Gdańsk) in the territory of the German-annexed Free City of Danzig. The camp was set up around existing structures after the invasion of Poland in World War II and initially used for the imprisonment of Polish leaders and intelligentsia. The actual barracks were built the following year by prisoners. Most of the infrastructure of the concentration camp was either destroyed or dismantled shortly after the war. In 1962, the former concentration camp with its remaining structures, was turned into a memorial museum.Stutthof was the first German concentration camp set up outside German borders in World War II, in operation from 2 September 1939. It was also the last camp liberated by the Allies, on 9 May 1945. It is estimated that between 63,000 and 65,000 prisoners of Stutthof concentration camp and its subcamps died as a result of murder, starvation, epidemics, extreme labour conditions, brutal and forced evacuations, and a lack of medical attention. Some 28,000 of those who died were Jews. In total, as many as 110,000 people were deported to the camp in the course of its existence. About 24,600 were transferred from Stutthof to other locations.