Mühltroff castle was probably in the 10th to 11th centuries to strengthen the rule of German Emperor, the knights to protect against attacks by the Sorbs with their fixings mortgaged founded. In 1357 the Plauen bailiffs had to hand over the castle to the Wettin margrave brothers Balthasar and Wilhelm , who then enfeoffed various vassal families with it. In 1380 the castle was burned down in the Guttenberg feud.
From 1949 to 1989, the castle, which was made public property of the GDR , was used as a residential building until it came back into Mühltroff's possession after the fall of the Berlin Wall. It was sold privately in 1999 as the only part of the castle and contains modern apartments.
As the cultural center of the place, the castle, which can be visited during guided tours, offers rooms for a wide range of club and exhibition activities as well as a wide range of events, with the 'black kitchen' being particularly worthy of mention.
The castle was founded as a low castle on a green stone cliff as a round defense and watch tower surrounded by moats , around which residential and farm buildings and a manor were built over the centuries.
The main building of the castle dates from the 16th and 17th centuries, when a lot was built. Remodeling took place after the fire in 1817 and the castle tower was redesigned between 1820 and 1837 and 1856.
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.