The Den Haller Mill is a historic mill located on the Molenbeek in Diepenheim. The mill dates back to around 1237, but the name ’Den Haller’ is a recent one. The name comes from Jan Hallers, who bought the mill from the city of Deventer in 1970. The mill was restored in 2004, and is now in use as a voluntary flour mill. The mill is open six days a week, and visitors can tour the mill, and purchase flour from the mill’s shop.