Celle in the context of Circular rampart

Bergen-Belsen (pronounced [ˈbɛʁɡn̩ˌbɛlsn̩]), or Belsen, was a Nazi concentration camp in what is today Lower Saxony in northern Germany, southwest of the town of Bergen near Celle. Originally established as a prisoner of war camp, in 1943, parts of it became a concentration camp. Initially this was an "exchange camp", where Jewish hostages were held with the intention of exchanging them for German prisoners of war held overseas. The camp was later expanded to hold Jews from other concentration camps.

After 1945, the name was applied to the displaced persons camp established nearby, but it is most commonly associated with the concentration camp. From 1941 to 1945, almost 20,000 Soviet prisoners of war and a further 50,000 inmates died there. Overcrowding, lack of food, and poor sanitary conditions caused outbreaks of typhus, tuberculosis, typhoid fever, and dysentery, leading to the deaths of more than 35,000 people in the first few months of 1945, shortly before and after the liberation.

Bergen-Belsen displaced persons camp was a displaced persons (DP) camp for refugees after World War II, in Lower Saxony in northwestern Germany, southwest of the town of Bergen near Celle. It was in operation from the summer of 1945 until September 1950. For a time, Belsen DP camp was the largest Jewish DP camp in Germany and the only one in the British occupation zone with an exclusively Jewish population. The camp was under British authority and overseen by the United Nations Relief and Rehabilitation Administration (UNRRA) with camp directors that included Simon Bloomberg. Today, the camp is a Bundeswehr barracks, having been a British Army base (see Hohne Station) until 2015.