Fort VII concentration camp
Poznań, Poland
Fort VII, officially Konzentrationslager Posen (renamed later), was a Nazi concentration camps set up in Poznań in German-occupied Poland during World War II, located in one of the 19th-century forts circling the city. According to different estimates, between 4,500 and 20,000 people, mostly Poles from Poznań and the surrounding region, died while imprisoned at the camp.
Prison data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).