Östergarn church is a little 13th century church where the tower of was never built. It was burnt by the Swedes in 1565 during the Nordic Seven Years' War, whereat all medieval fittings were destroyed. It was also sacked by the Russians in 1715 and 1717. In a grave in the church yard lie the German seamen who fell on board the cruiser Albatross, when she was compelled by superior Russian forces to run ashore near the fishing village of Herrvik in Östergarn in 1915.
References:The Gravensteen is a castle in Ghent originating from the Middle Ages. The name means 'castle of the counts' in Dutch. Arnulf I (918–965), Count of Flanders, was the first to fortify this place, building a medieval bastion on this high sand dune, naturally protected by the river Leie and its marshy banks. This bastion consisted of a central wooden building and several surrounding buildings, also in wood.
In the early 11th century, the wooden building was replaced by a stone residence, consisting of three large halls that made up three storeys, connected by a stone stairwell. The monumental stone staircase, the light openings, the fireplaces built into the walls and the latrines were signs of considerable luxury and comfort in those days. There was probably also a tower.