 In 1525, the final blow came.In the Danish throne quarrel, the Lübeck, a Free City of the Holy Roman Empire and a leading member of the Hanseatic League, supported Frederick I, while Søren Norby the Danish governor of Gotland fought for Christian II, even after Christian's official resignation in 1523.While Norby fought a military action in Sweden, the Lübeckers successfully attacked Visby and set the city on fire from four sites.