Visborg

Visborg refers to a castle within the town of Visby at the Swedish island of Gotland. Successive fortresses had been built in Visby, even though Visborg is commonly in reference to the citadel constructed here with the aid of King Eric of Denmark, Norway and Sweden.

Duke Eric seems to be the first to assemble a fortress in the southwest nook of Visby in 1310 as part of a battle between his brothers for control over the kingdoms of Sweden and Norway as well as Danish claims on Gotland; this brings Gotland below Norwegian manipulate. When King Magnus IV, son of Duke Eric, turns into King of Norway and Sweden it falls underneath his control. In 1356 King Magnus gives control of Norway to his son, King Haakon VI Magnusson, even though Magnus still remains as King of Sweden. In July 1361 Danish forces, below King Valdemar Atterdag, land in Gotland and overwhelm and capture Visby on 27 July, killing as a minimum 2000 peasants. The following yr, 1362, Swedish Nobles insurrection and Haakon King of Sweden.