Gløshaug Church is a wooden stave church constructed in 1689 and seats about 100 people. The site of the church has been used all the way back to around 1160. It originally was a St. Olaf church according to Grankvist. A manuscript from 1597 calls the church then 'Olafshougs Kirke i Hærø fierding', meaning St. Olaf's Church of Harran. St. Olaf is the patron saint of Norway. The first church building on this site was built around 1170, and it was restored in 1433 and 1510. In 1689, the old church was replaced by a new stave church, which still stands today.
In the 1800s and 1900s, several Englishmen (some of those were noblemen) owned houses along the river at Gartland, where they lived during their stay in Grong. One was Thomas Merthyr Guest, a man of considerable wealth. He bought two Gartland farms and in 1873 the old Gløshaug Church. Grong municipality wanted to tear down the old church and build a new church for Harran, but instead Mr. Guest restored it. The new Harran Church was put up at Fiskum in the village of Harran. Mr. Guest's widow sold the church in 1908 to a local farmer who in turn in 1910 gave the church to the municipality.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.