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Mysen is the administrative center of the municipality of Eidsberg in the county of Østfold in Norway.
The town is named after the old farm of Mysen (Norse Mysin, from *Mosvin), since the town is built on its ground. The first element is mosi m 'bog, marsh', and the last element is vin m 'meadow, pasture'.
During the Second World War, there was a Nazi concentration camp at Mysen. One camp commandant was Hans Aumeier, who was later tried and convicted at the Auschwitz Trial.
Media related to Mysen at Wikimedia Commons
59°33′N 11°20′E / 59.550°N 11.333°E