Schloss Sandfort, Heritage château in Olfen, Germany.

Schloss Sandfort is a water castle in Vinnum, a district of Olfen. Its oldest parts are two round towers from around 1450; the upper castle was built between the late 16th and early 17th century. A massive four-storey tower carries a curved Baroque cupola, and two neoclassical farm buildings flank the gate entrance, built in 1851 and 1857. The brick façades with white-framed windows stand directly in the surrounding water.

Built around 1450 as a moated castle, Sandfort retains its two round towers from that period; the upper castle was rebuilt between the late 16th and early 17th century. From 1300 to about 1550 it belonged to the lords of Mecheln, then to the Fridag-Löringhoff family, in 1719 to the von Bodelschwingh, and from 1869 to the counts von Wedel. Around 1910 the estate covered 998 hectares.

The name Sandfort comes from the family that first held the estate; from 1300 to about 1550 it belonged to the Lords of Mecheln, followed by the von Fridag-Löringhoff. The gate pillars of the forecourt bridge carry coats of arms inscribed Fridag and Reck, dated 1711. The castle is still lived in by the Graf vom Hagen-Freiherr von Plettenberg family and can only be viewed from outside.

Schloss Sandfort is still lived in by the family Graf vom Hagen-Freiherr von Plettenberg, so it can only be viewed from the outside; there are no guided tours of the interior. Visitors see the water-ringed complex, the two round towers and the gate pillars bearing the coats of arms of Fridag and Reck dated 1711.

The gate pillars of the forecourt bridge carry coats of arms labelled Fridag and Reck, dated 1711. They mark the era of the von Fridag-Löringhoff family, who held the estate before the von Bodelschwingh took over in 1719. The two round towers, by contrast, survive from the moated castle built around 1450.