The Abbaye du Relec was founded in 1132. It had an innovative hydraulic mechanism for irrigating the gardens and pumping water through the buildings. It also made a significant contribution to the local economy by developing the lands called La Quévaise. Today There is a large Romanesque church, vestiges of cloisters, two lakes, a pathway lined with trees, a monumental fountain and ancient gardens surrounded by deep ditches; all these elements trace the existence of the monks here for over six centuries. This Abbey is open to the public all year round.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.