Saint Lawrence’s church (Sankt Lars) was built in the central parish around 1210-1220. In the same cemetery a German parish church, Holy Trinity (Drotten in Swedish), was built around 1240. The church was abandoned after the Reformation. Architecturally, Saint Lawrence has its models in Orthodox churches, and it has been wrongly suggested that it would have been a Russian church. It’s more reasonable to imagine an architect influenced by Russian architecture. Sometimes the church has been called Saint Anna (Sankta Anna) the mother of the Virgin Mary.
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.