Stone in the brick wall of the Southern lock indicating the construction year of this part of the lock 1738. ."Noorder- and Zuidersluis (Northern and Southern lock) in Schardam: over 700 years old. The Noorder- and Zuidersluis date back to the 14th century. At that time, these were still completely wooden constructions. In the 18th century the side walls were replaced by stone walls." [source: wikipedia] .Schardam, West-Friesland, North-Holland, the Netherlands