Herlufsholm Church is Denmark's broadest single nave church and was the monastery church for the Woodland Monastery of the Benedictine Order. The church dates back to 1135. When Herluf Trolle and his wife Birgitte Goeye acquired the monastery in 1560, the church was renamed Herlufsholm and it became the area's parish church. In the chapel under the choir, Herluf Trolle and Birgitte Goeye lay buried. They are also remembered in an epitaph. In the northern arm of the choir there is a sepulchral monument to Marcus Goeye with an epitaph by Thomas Kingo. The jewel of the church is an ivory crucifix, a 75cm high and carved from a single tusk - one of Denmark's finest works of art.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.