Burg Stolpen is a castle built on top of the Schloßberg. The first defensive works were built about 1100 and it was first documented in 1222. Owned by the Bishop of Meißen for nearly 350 years, it passed to the Electorate of Saxony and was expanded in Renaissance style. By being converted into a fortress in 1675, Stolpen received increased military importance. After the end of the Augustinian Age in 1763, the garrison was dissolved. Two years later, Stolpen’s most famous captive, Countess Cosel, died at the fortress, aged almost 85. The most well-known mistress to Saxon Elector and Polish King Augustus the Strong had spent 49 years of her life at Stolpen against her will. Her burial place is located inside the Stolpen Castle Chapel.
The castle fell into disrepair towards the end of the 18th century. It became a museum in 1875, and has been partly restored since then. An average of approximately 100,000 visitors a year come and see Stolpen Castle today. Apart from the daily museum operation, an extensive program of events invigorates the castle. The historic Granary with its original wooden-beam architecture as well as the unique flair of the castle yards make each event a grand experience.
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.