This island's site of Ajvide was a camp for Mesolithic people who hunted harp seals until they were driven out by early farmers of the Pitted Ware culture.  
This island's coat of arms is a ram carrying a yellow and red banner.  A ship named for this island was the first submarine to use air-independent propulsion.  This island's site of Ajvide was a camp for Mesolithic people who hunted harp seals until they were driven out by early farmers of the Pitted Ware culture.  Valdemar Atterdag suppressed a peasant rebellion on this island which ended with a battle at (*) Visby, this island's Hanseatic trading port. Occupied by the Teutonic Knights until the late 1400s, this island was then sold to Eric of Pomerania. It was given to its current owner in the Treaty of Bromsebro.  For 15 points, what Swedish island is the largest in the Baltic?
This island's coat of arms is a ram carrying a yellow and red banner.  
{Gotland}