The history of Herttoniemi Manor dates back to the 16th century. The Herttoniemi area is probably named after Laurens Hertoghe who might have been the first owner of the manor. The heyday was in the late 1700’s, when the manor was owned by Augustin Ehrensvärd. He led the construction of Suomenlinna fortress.
The present main building originates from the beginning of 19th century, when the manor was owned by admiral Carl Olof Cronstedt. The old porcelain factory was changed as the new main building and the park was established around it.
Today Herttoniemi park is an artistically unique milieu. The combination of baroque and English garden is one of the greatest in Finland. The main building functions as a manor museum and the park is open to the public. There is also an old old farm brought from Sipoo which is an outdoor museum.
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.