The first stone castle in Alsunga was built in 1372, starting with the central part of the southern wing. The authorised representative of the Livonian Order, who was subject to a higher-ranking official in Kuldīga, lived here. The guard towers and other parts of the castle were gradually added between the 15th and the 18th century. The Baroque castle with its two towers is quite impressive. Institutions in the building are the Alsunga Administrative District Council, a museum, a tourist information centre, and others.
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.