Fort VII

Fort VII, officially Konzentrationslager Posen (later renamed), was a Nazi concentration camp set up in Poznań in occupied Poland during World War II, located in one of the 19th-century forts which ringed 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.

• http://en.wikipedia.org/wiki/Fort VII