The Tudor Museum, also known as Rosport Castle was built in 1892, it was the home of the Luxembourg inventor Henri Tudor. During the German occupation of Luxembourg in the Second World War, the castle was used to accommodate girls assigned to the Reichsarbeitsdient who performed farming and house-keeping work. Around 1957, it became a guest house and, in 1964, the American firm Monsanto converted it into a hotel. However business was not very successful and in 1970, the Commune of Rosport bought the castle for its own administrative offices while continuing to rent out the first-floor apartments to vacationers. In 1972, these were replaced by a holiday home for old people.
After restoration work was completed in 1999, serious consideration was given to opening a museum on the premises. In 1981, the celebrations for Tudor's 100th anniversary had included an exhibition on the development of the lead–acid battery, his principal success. Although the decision to go ahead with the museum was reached in 1995, many difficulties had to be overcome and it was only in May 2009 that the 'Friends of the Henri Tudor Museum' were finally able to open it to the public.
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.