The first known owner of Stora Väsby manor was Knut Karlsson (1485-1506). The Kurck noble family sold in to industrialist Emanuel de Geer in 1668. The present manor of Stora Väsby was completed around 1760 based on the design of Carl Hårleman. It is one of the best preserved Rococo-style buildings in Uppland.
Next to the castle is a Baroque-style park, which was built in the 1600s. The park was symmetric with hedgerows, trees and three ponds. Today Stora Väsby houses offices and residential apartments.
References:Château de Niort is a medieval castle in the French town of Niort. It consists of two square towers, linked by a 15th-century building and dominates the Sèvre Niortaise valley.
The two donjons are the only remaining part of the castle. The castle was started by Henry II Plantagenet in the 12th century and completed by Richard the Lionheart. It was defended by a rectangular curtain wall and was damaged during the Wars of Religion. In the 18th century, the castle served as a prison.
The present keeps were the central point of a massive fortress. The southern keep is 28m tall, reinforced with turrets. The northern tower is slightly shorter at 23m. Both are flanked with circular turrets at the corners as well as semicircular buttresses. Each of the towers has a spiral staircase serving the upper floors. The Romanesque architecture is of a high quality with the dressed stones closely jointed.