Meysembourg Castle has a history dating back to the 12th century, but today's castle was built in 1880 in Neo-Renaissance style and is privately owned. The Meysembourg family is first mentioned in the 12th century when Dame de Meysembourg was in the service of Ermesinde, Countess of Luxembourg. Historic references show that Walter de Meysembourg was the propretor in 1176 and Eberhart de Maysembourg in 1296. In 1443, the castle was destroyed by Philip the Good but was rebuilt before 1500. It was again destroyed by Maréchal de Boufflers troops in 1683–84. All that remains of the former castle are the chapel, the moat and part of the outer wall. Custine de Wiltz, the last in line to inherit the property, fled during the French invasion in 1794. Following a public auction in 1798, the castle fell into the hands of the Lords of Fischbach, Cassal and finally Jean-François Reuter of Heddersdorf who occupied the village after expelling its inhabitants.
After buying the property in 1885, the Prince of Arenberg demolished it in 1880 and built a new castle in Neo-Renaissance style. In 1971, the State architect Charles Arendt carried out restoration work. The property now belongs to the Spiegelburg family. The castle is now privately owned and is not open to visitors.
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.