Château de Launac was built by the viscounts of Gimoes in the 12th century. In 1148 the castle passed into the house of Isle Jourdain. Dismantled after the Treaty of Paris in 1229, the fortress was rebuilt in the fifteenth century by Carmaing Nègrepelisse. It consisted of four corner towers including an old keep from the twelfth century.
This castle was undoubtedly again dismantled by Cardinal Richelieu under the reign of Louis XIII. Today two wings remain. Inside the castle is a monumental fireplace and painted decorations from the XVth century.
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.