In the town district “Amsterdam North-Buiksloot” along the “Noord Hollands Kanaal”, there is a unique national monument : the last remaining wind powered trass- and chalkmill in the world.
The official name of this stagemill is “d’Admiraal” , unofficially the mill is known as the “chalkmill” or the “chalkmill d’Admiraal”, referring to the major product the mill produced. This mill was especially built for grinding stone of various kinds such as chalk and also trass, a vulcanic stone that was delved in the “Eiffel”. Trass being an important bricklaying product.