Originally built by King Kazimierz to protect the money-making mining centre of nearby Olkusz, Rabsztyn actually consists of two separate castles – the original 14th century upper castle and the much-larger lower castle added at its foot in the 17th century in the Renaissance style. The Swedes saw to it that neither was inhabitable shortly thereafter during their 17th century invasion.
Today there is almost nothing to see of the upper castle, in fact most won’t even be able to discern the remnants of its walls from the rock surrounding it. The upper castle’s main feature was a cylindrical tower which irreverent fortuneseekers dynamited in the late 1800s. The walls of the lower castle still stand giving some indication of the size of this former strong-(but not strong enough)-hold, and recently the castle gate, several bridges and one of the towers was restored. Today it houses a small historical museum. All told, Rabsztyn's ruined splendour is pretty as a picture so don’t forget your clicker.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.