The Geregtigheid mill is an 18th century corn mill located on Valkenburgerweg in the city of Katwijk. The mill was built in 1740 to a traditional round stones ’stellingmolen design’. The internal workings of the mill were upgraded in 1933, and again in the 1960s. A fire caused serious damage to the interior of the mill in 1963. The town bought the mill in 1965, and began restoration work in 1968. The Geregtigheid mill is still in use today.