Olen, Belgium

Olen () is a municipality located in the Belgian province of Antwerp. The municipality comprises three towns, situated on a south–north axis:
On January 1, 2015, Olen had a total population of 12,239. The total area is 23.10 km².
History of Uranium mining.
In the 1920s and 1930s the Union Minière du Haut Katanga company, operating in the then Belgian colony of Congo, had a virtual monopoly of the world uranium market (holding most of the deposits known at the time). The uranium mined in Congo was mostly transported to the UMHK refinery for uranium ore which was located in Olen.
Some 1200 tonnes of uranium stored at the Olen refinery were captured by the Germans during the invasion and occupation of Belgium in 1940, and only recovered by US troops at the end of World War 2.