Dunau windmill, Smock mill in Lathwehren, Lower Saxony, Germany

Dunau windmill is a four-storey smock mill in Lathwehren, part of Seelze in Lower Saxony. Its lower storeys are rubble masonry on a square plan, topped by an octagonal timber smock clad in red brick, with a curved cap and four sails. The gallery that once ringed the top floor has been removed.

A water mill built in 1712 on the Haferriede served the Dunau manor until a fire damaged it in 1851. Permission for a windmill had been refused since the 1820s; after the fire it was granted, and in 1852 a four-storey gallery smock mill rose on the surviving water-mill building. The mill pond was filled in, and milling stopped in 1958.

The mill is part of the Dunau manor estate, whose miller was first recorded in the 1689 head-tax register. The last miller died in the Second World War, and his widow ran the mill with a journeyman until it closed in 1958. Since the 1990s the building has served as a dwelling.

The mill stands on the edge of Lathwehren and is accessible via small country roads that branch off from the village center. Access is usually on foot along a short field path that is easy to walk in dry weather.

The mill's four sails are gone; only the wooden crossbeam remains, and the gallery that once ringed the top floor was dismantled during the 1985 renovation. The wind rose survives only as its buck. At the end of 2020 the wing shaft was made movable again and two roughly 10-metre breast pieces were replaced with used steel parts from the Bederkesa windmill.