Changing hands: Halmstad Castle, from Denmark to Sweden

Halmstad Castle, located in Halmstad, Sweden, was built under the reign of King Christian IV of Denmark in the 17th century. Initially, the castle was a part of Halland, a Danish province. However, the Second Treaty of Brömsebro in 1645 transferred the castle to Bengt Christoffersson Lilliehook, the first Swedish governor of Halland following the Treaty of Roskilde in 1658. As Halland became a Swedish province, the castle served as a residence for visiting Swedish kings. The Swedes completed the castle's inner fortress in 1658. From 1770, the castle underwent multiple restorations. Today, Halmstad Castle functions as the traditional residence of the governor of Halland County, with some offices of the governor and local authority located there.

Sources: Wikipedia, OpenStreetMap, Wikidata, Wikimedia Commons