The Château de Terraube was built around 1272 for the de Galard family, Merovingian dukes of Gascony; a date on the doorway confirms this. The de Galards have owned the castle ever since. It was altered and enlarged in the 16th and 17th centuries. The residence was enlarged from 1768 by the master masons Guillaume Gras, Jacques Lapeyronie and Dominique Ducasse. Two further residential buildings were added around 1773 by masons Guillaume Aurio and Joseph Labarthe.
Stone decorations include animals, people, gargoyles and coats of arms, including those of the Galards on a chimney.
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.