Ytternas, Langnas and Berghamn are among the main ports of this archipelago, whose main island is Fasta.
Bo Jonsson was the first owner of one castle in this archipelago, which is thought to have been the farthest extent to which the Comb Ceramic culture spread in the west. This archipelago was transferred to one nation via the Treaty of Hamina, and its only land border is on the skerry of Market. Ytternas, Langnas and Berghamn are among the main ports of this archipelago, whose main island is Fasta. The Bomarsund Fortress on these islands was destroyed during the Crimean War, and they were demilitarized in the ensuing Treaty of Paris. With capital at Mariehamn and lying at the entrance of the Gulf of Bothnia, for 15 points, identify this autonomous Swedish-speaking archipelago of Finland.
Bo Jonsson was the first owner of one castle in this archipelago, which is thought to have been the farthest extent to which the Comb Ceramic culture spread in the west.
Aland Islands [or Ahvenanmaa Islands]