Sundbyholm was originally owned by the Order of St. John, who had an abbey in Eskilstuna. After the Reformation it was confiscated to the Crown. The Sundbyholm Castle was built by the Admiral of the Navy Carl Gyllenhielm, son of King Charles IX of Sweden. The estate was given to him in 1627. The castle was later enlarged by Seved Bååts.
Sundbyholm Castle is known for the beauty of its grounds and nearby environs. It has been the subject of several paintings and drawings, the most famous of which is "The Old Castle" by Prince Eugen, Duke of Närke.
Today Sundbyholm is a hotel and offers facilities for conferences, parties and weddings.
References:The Château de Foix dominates the town of Foix. An important tourist site, it is known as a centre of the Cathars. Built on an older 7th-century fortification, the castle is known from 987. In 1002, it was mentioned in the will of Roger I, Count of Carcassonne, who bequeathed the fortress to his youngest child, Bernard. In effect, the family ruling over the region were installed here which allowed them to control access to the upper Ariège valley and to keep surveillance from this strategic point over the lower land, protected behind impregnable walls.
In 1034, the castle became capital of the County of Foix and played a decisive role in medieval military history. During the two following centuries, the castle was home to Counts with shining personalities who became the soul of the Occitan resistance during the crusade against the Albigensians.