Duntrune Castle is thought to be the oldest continuously occupied castle on mainland Scotland. It was originally built by the MacDougall clan in the 12th century, along with several other castles in the area, including the MacDougall stronghold of Dunollie Castle near Oban. Duntrune Castle was eventually taken by the Clan Campbell. In 1644, the castle was besieged by the rival MacDonalds, under Alasdair Mac Colla. The Campbells sold Duntrune in 1792, to the Malcolms of Poltalloch. The castle is now owned by Robin Neill Malcolm, current clan chief of the Clan Malcolm.
The curtain wall of the castle dates from the 13th century, although the tower house which forms the main part of the castle is of the 17th century. The castle was renovated in 1954.
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.