The electoral hunting lodge Breitenbrunn (Jagdhaus) in the Ore Mountains community of the same name was converted from a watchtower, which was probably built in the 13th or 14th century, is now a ruin under monument protection and is a landmark of the place.
After a Vorwerk of the Schwarzenberg rulership was first built and later a settlement was built, the watchtower was converted into a hunting lodge, accommodation and storage for hunting utensils. The building, which was also used as the forester's house, burned down in 1610, including the newly added third floor and added Wendelstein, and in 1617, was rebuilt and fell into ruin, apparently unused, after 1700.
References:Towering 52 meters above the sea, Bengtskär lighthouse is the tallest one in Scandinavia. The building started in in 1905 after the shipwreck of S/S Helsingfors and was completed in 1906. The lighthouse was designed by architect Florentin Granholm. On December a special petrol lantern, designed and built in Paris, was brought to Bengtskär and installed atop the tower.
German fleet bombarded Bengstkär in the First World War in 1914. Since the Gulf of Finland was heavily mined, it was not until 1919 that the surrounding seas were declared safe for shipping, that the light was lit again.
After the war the military value of Bengtskär increased as part of the defence system of independent Finland. In Second World War (1941) Soviet Union made a suprise attack to island. After a bloody battle, the small Finnish garrison emerged victorious. Intermittent repairs to the facility continued during the post-war period.