Ensdorf Abbey was a house of the Benedictine Order, dedicated to Saint James. It was founded in 1121 by Pfalzgraf Otto of Wittelsbach. The monastery was dissolved in 1556 but restored in 1669, only to be dissolved again in 1802 in the secularisation of the period. The premises were taken over in 1920 by the Salesians of Don Bosco, who still occupy them.
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.