Rauenstein Castle guarded the crossing over the River Flöha along the road from Freiberg to Annaberg. The castle is first mentioned in 1323, although from archaeological investigations it is postulated that it had been built by around 1200. The first lords of Rauenstein were the Schellenbergers.
After several changes of ruler, the castle went into the possession of the Electorate of Saxony in 1567. The Amt of Rauenstein was given to Wolkenstein in 1596. Around 1630 large structural changes were made. The road tunnel also dates to this time.
From 1651 to 1743 the castle was rented to the von Römer family, who had become very wealthy as a result of silver mining in the Schneeberg area. Its owner, Christian August Hähnel, who had bought Rauenstein in 1816, his nephew, Wolfgang, Freiherr von Herder (owner from 1843 to 1853) and another family member, Wilhelm Freiherr von Herder, were members of the Saxon Landtag. The next owner, Gottfried Freiherr von Herder, was a German Conservative Reichstag MP from 1893 to 1898.
After its confiscation as part of the land reform in the Soviet Zone of Occupation in 1945, the castle was used as a children's convalescent home. It has been owned by a private family since 1998 and may now only be viewed from the outside.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.