Sonnenburg castle hill has almost 4000 years history. It has been an early historical settlement, Roman camp, early medieval castle complex, 750 years as a convent, stone quarry, ruins and poorhouse. In 1022 Count Volkhold gave the castle to Benedictines and it was converted as an abbey. The ruins of the apses, which grow out of the rock, archaic and replete with strength, tell of power and wealth, faith and devotion, but likewise of deterioration and decline.
Today’s Sonnenburg is a hotel with a reservoir of historical detail. Wandering through the house we come across impressive relicts from bygone times: Gothic frescos in the former chancel, coffered ceiling in the Residenzstube (“Residence Parlour”), Stone age spearhead and the “in-house Saint Clement” who rests in the crypt.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.