St. Clement church was first mentioned in the 13th century. It acquired its present-day appearance after numerous renovations in the year 1773 and extensive restoration in the year 1890.
It was dedicated to one of the first Roman popes – St. Clement. Because of the dreaded plague that propagated throughout Istria in the 17th century, the church was renamed Our Lady of Health Church, as St. Mary was, together with St. Rocco, an intercessor against plague.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.