Ulvsunda castle was built by Field Marshal Lennart Torstensson between 1644-1647. His family owned the estate until 1727. Since them Ulvsunda has been owned for example by Bielkegatan ,Gyllenkrook , Rudenschöld and Ruuth families. Baron von Essen bought it in the early 1800s and the current appearance dates from the restoration made in 1830s. Today Ulvsunda is a hotel, restaurant and conference centre.
References:The Gravensteen is a castle in Ghent originating from the Middle Ages. The name means 'castle of the counts' in Dutch. Arnulf I (918–965), Count of Flanders, was the first to fortify this place, building a medieval bastion on this high sand dune, naturally protected by the river Leie and its marshy banks. This bastion consisted of a central wooden building and several surrounding buildings, also in wood.
In the early 11th century, the wooden building was replaced by a stone residence, consisting of three large halls that made up three storeys, connected by a stone stairwell. The monumental stone staircase, the light openings, the fireplaces built into the walls and the latrines were signs of considerable luxury and comfort in those days. There was probably also a tower.