 In the first half of the fourteenth century (1300-1350) Visby was at the height of its wealth and influence, and it was during this time that Laws of Wisbuy, a set of maritime laws that had broad influence in the Baltic and beyond, were probably promulgated.In 1361, Gotland was conquered by Valdemar IV of Denmark.1,800 Gotlanders were killed in battle in front of the city.