Gewerkenegg Castle dominates the Idrija city. It was erected at the beginning of the 16th century to serve as the administrative headquarters and warehouse of the Idrija mine, then the second largest mercury mine in the world. The now beautifully restored Renaissance complex experienced a Baroque renovation in the middle of the 18th century when the inner arcaded courtyard was created and painted with attractive decorative frescoes.
The castle now houses the Idrija Museum, whose central exhibit-Five Centuries of Mercury Mining and the Town of Idrija-offers a survey of the half-millennium history of the oldest mining town in Slovenia. It also offers an exhibit of Idrija lace, a replica of a room in an Idrija miner's home, peasant frescoes, memorial rooms of the writer France Bevk and the politician Aleš Bebler, and a collection of paintings donated by the gallery owner Valentina Orsini Mazza. The castle also provides rooms and a concert hall for the Idrija Music School. Throughout the year, the museum organizes various events, presentations, and receptions in the castle hall. The Museum Evenings lecture series is especially popular. In summer, the Castle Evenings program of cultural events, mostly concerts, moves into the castle courtyard.
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.