Forts in Middenbeemster
On the south side of Polder Beemster are a few fortified forts of the Defense Line of Amsterdam. The earthworks were constructed in 1886-89, the defendable earthworks in 1895. The bomb-free buildings of concrete were realized in 1911-'14 in the form of a main building and a lift-dome building, interconnected via a barrel. The head support of this p...
