The Dutch group shelters, part of the New Dutch Water Line, were designed as a shelter by shelling and bombing, if the trenches between the shelters did not give enough coverage. The principle was based on the fights in the First World War.
The group shelters were build in 1940. A number of these were not completed yet with the outbreak of the Second World War. The build of these were not finished.
These personnel bunkers were called 'Pyramids' by the Germans, because of their shape.
The bunker was divided in two in 2010 by sawing loose and removing a piece about one meter wide. This as part of the government project "Molenkade".
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