Wiedersberg Castle was built around 1200 to protect the route from Plauen to Hof. The first documentary evidence dates from 1267. The castle is considered the ancestral home of the barons Wiedersperger. The castle was expanded after 1300 and fell into disrepair from 1500. In the 16th century, a mansion in the Renaissance style was built in the valley in the local area. Today the ring wall and gate tower remain, as well as some vaulted cellars and the surrounding walls. The double neck ditch carved into the rock and the gate drive of the gate tower, which swings around 90 degrees in the tower, are remarkable.
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.