Stutthof was a German Nazi concentration camp completed on September 2 1939 in a secluded, wet, and wooded area west of the small town of Sztutowo located in the former territory of the Free City of Danzig. It was the first camp built outside of 1937 German borders and the last camp liberated by the Allies, on May 9, 1945. More than 85,000 victims died in the camp out of as many as 110,000 people deported there. Soviet forces liberated Stutthof on May 9, 1945, and liberated about 100 prisoners who had managed to hide during the final evacuation of the camp. Today Stutthof is a museum.References:
First record of Kastelholma (or Kastelholm) castle is from the year 1388 in the contract of Queen Margaret I of Denmark, where a large portion of the inheritance of Bo Jonsson Grip was given to the queen. The heyday of the castle was in the 15th and 16th centuries when it was administrated by Danish and Swedish kings and stewards of the realms. Kastelhoma was expanded and enhanced several times.
In the end of 16th century castle was owned by the previous queen Catherine Jagellon (Stenbock), an enemy of the King of Sweden Eric XIV. King Eric conquered Kastelholma in 1599 and all defending officers were taken to Turku and executed. The castle was damaged under the siege and it took 30 years to renovate it.
In 1634 Åland was joined with the County of Åbo and Björneborg and Kastelholma lost its administrative status.