Gotland is an island to the east of mainland Sweden, and its largest town, Visby, was a city of the Hanseatic trading league.
Gotland was ruled by a number of powers in turn, such as the Victual Brothers pirates, the Teutonic Knights, and Denmark, finally passing into Swedish rule in 1645.
The walled city of Visby is a UNESCO World Heritage Site. Gotland is now a popular holiday destination for Swedes. To get from Stockholm to Visby, you can take an hour of commuter train to Nynäshamn and change to a ferry of Destination Gotland which takes 3 hours. You can also take a short flight from Arlanda or Bromma Airport.