The post mill stood on the northwestern bastion of Saint Maximilan, the tower of which was built at the turn of the 16th and 17th centuries. The two-and-a-half-storey residential building dates from the 19th century. The spire and wings are missing. The western half of the mill tower was clad in shingles.
The tower has numerous small window openings. In the lower third, consoles are placed around the cone. The residential building is on the right. The entrance to the tower is in the corner of this house.
The building originally served as a monastery and town mill. It was destroyed in 1702 and then rebuilt as a tower windmill. The mill was in operation until 1814. In 1826, Theodor Fliedner acquired the building to build a water pumping station to supply the diaconal institutions. In 1889, a well was dug in the mill. After the Second World War, the mill and its extensions served as a guest house for a Duisburg measuring instrument manufacturer and as a residential building.