The small St Proculus church near Naturno is undoubtedly a historical treasure. It dates back to the 7th century AD and features the probably most ancient frescos of the German speaking area and the most complete early fresco cycle of Tyrol. Furthermore there are some Gothic frescoes from the 14th century.
The building itself has been established between 630 and 650 AD. The age of the oldest pre-Carolingian frescoes, however, is rather contested, new datings refer to the period of time between the 7th and 10th century. The most famous fresco shows a man on a swing, probably St Proculus himself.
Only a stone’s throw from the chapel, there is also the Proculus Museum, which has been inaugurated in 2006. The museum is allocated subterraneously and takes visitors into 1,500 years of history of the area around Naturno. Four time-space showrooms take you across late antiquity, Middle Ages and early modern times. Moreover in the museum you can admire the Gothic frescoes which have been taken down from the walls of the St Proculus church.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.