Astino Abbey was founded around 1070 by a group of members of the Vallumbrosan Order led by John Gualbert during a time in which, through reforms, clerics were trying to revive the Catholic Church's position.
The Romanesque church and the first conventual buildings were built by Bertario, the first abbot, who supervised the abbey for 21 years until 1128.
The monastery was suppressed on 4 July 1797 by the ciil aurhorities of Bergamo. Its assets were given to the nearby hospital, founded and previously run by the monks.
In 1832 the site was put to use as a psychiatric hospital, which it remained until 1892. It was then used for agricultural purposes, and was sold to private buyers in 1923.
In 1973 the property was acquired by a private company for conversion into a golfing centre, but the plan ran into so much opposition that it never came to fruition, and the monastery buildings have been left neglected until 2015.
The Church of Santo Sepulchro was consecrated in 1117, but has been rebuilt over the centuries. The base of the bell-tower dates to the 12th-century, but now has a baroque superstructure atop. The building includes a cloister of the 15th century and a chapel to the memory of Blessed Guallo de Roniis, exiled bishop of Brescia.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.