Skansen Kronan is a redoubt built in the later half of the 17th century according to the plans of Erik Dahlberg. Skansen Kronan was introduced in 1698 and was fitted with 23 guns. The roof was not completed until 1700. Skansen has 4-5 metre thick walls made of granite, gneiss and diabase. Skansen Kronan was never attacked and the cannons on the inside have never been used.
The fortress and the twin counterpart, Skansen Lejonet, were built as part of the defenses against possible Danish attack on Gothenburg from the south, and thus had a similar purpose as the Älvsborg Fortress.
The fortress - originally built outside the city walls - is today situated in the city centre of Gothenburg on a hill in the city district of Haga. It was used as a military museum until 2004. Today Skansen Kronan is a private facility for conferences and private parties.
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.