Château de Bouvées was built between 1530 and 1560 by Monseigneur de Saint-Julien, Bishop of Aire-sur-Adour, on the ruins of an earlier structure. At the time of the French Revolution, it was sold as a national asset.
The building consisted of three wings enclosing an inner courtyard, flanked in the corners by round towers. Only the east and south parts remain, the agricultural buildings attached to the ancient walls reproducing the earlier layout. Of the towers, all that remain are that in the south-east and traces of the south-west. The pigeon loft was built on the base of a tower. A demolished wall near the chapel reveals the former gatehouse which led into the courtyard. The chapel still has sculptures and two mullioned windows decorated with mouldings. Attached is a round tower standing on a base with four floors. A vaulted cellar gave surveillance of the surrounding area by spy holes. Inside are 15th and 18th century chimneys, earthenware paving, beamed ceilings and visible joists.
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.