The original construction of Broager Church dates from about 1209. The chapel and vestry are Gothic-style and the whole church is built of bricks. The churchyard has the tallest wooden bell tower in Denmark, which dates back to 1650.
The church itself is decorated with murals from various periods. Restoration of the church in 1924-27 revealed frescoes from different periods; Romanesque from the beginning of the 13th century, late-Gothic from about 1500 and Renaissance paintings from 1587. The chapel's murals depict the legend of Saint George and the Dragon, and his martyrdom. These pictures, together with the late medieval carved wooden figure of the dragon slayer from app. 1490 formed the setting for the chapel's Saint George cult. In the late 1990s, restoration was done.
The altarpiece was made by Dutch artist Anthon Günther Lundt and dating from 1717. The style is Baroque with acanthus foliage. The pulpit is Renaissance from 1591 made at one of the fine local joiner-workshops in Flensburg. The crucifix from approx. 1250 is a mixture type between Late Romanesque and early Gothic. The baptismal font origins from the first building period of the church together with the communion table. The font is composed of two types of granite; a reddish basin upon a greyish foot. Upon the foot are four carved male heads, two with pageboy haircuts and no beard and two with center parting and beard. The lid of the font is a wooden crown from 1787. The baptismal basin is of brass and dates from the same period.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.