Høre stave church was built in 1180 and rebuilt around 1820. It is the second church on this location, the previous church was a post church (a church with earth-bound posts standing directly on the ground). It is dated through a runic inscription to 1180, and through dendrochronology to 1179.
There are a number of graves under the church, including those of children. A runic inscription upon the pulpit reads: The brothers Erling and Audun had the timber for this church felled, the summer that Erling Jarl fell in Nidaros. This refers to the Battle of Kalvskinnet in 1179. There are also several other runic inscriptions, and items with runic inscriptions in the church. It is possible that Duke Skule Bårdsson was married in this church in the 13th century.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.