The castle at Bodenheim is the only preserved family seat of the former Brabant landowners of Lommersum, which was still a fiefdom in the late 18th century. On the estate there is clear evidence of the original medieval two-part castle with a moat. The picturesque manor house, with its many corners and angles, stands on an artificial mound and the moat has been dry for decades.
The oldest preserved part is the west wing, with its corner tower and stair-tower in the courtyard. The castle was first mentioned in records in 1194 when the first aristocratic lineage was named. The heirs of this lineage were at first the Brents von Vernich and finally von Tomberg, who also built the largest part of the castle as it is known today. 1625 the estate was transferred by marriage to the family von Hersel, who lived in the castle for almost 200 years. In 1845 Earl Edmund von Hatzfeld-Weisweiler sold the castle to the Duke of Aremberg, who leased it to the Kieselstein family. In 1934 the family acquired the castle and still live in it today.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.