The Church of St. Michael in Synkavichy is a Gothic church was built in 16th century. It is one of the first fortified churches in Grand Duchy of Lithuania. In 1880-1881, the temple was significantly reconstructed. In 1926, it was rebuilt as a Catholic church. In 1988-1990, it become Orthodox. This site was added to the UNESCO World Heritage Tentative List in 2004.
The defensive system of the church consists of four towers and loopholes placed under the vaults. The interior of the church looks like a hall, its cross-shaped vaults with nervuses rest on six pillars. With the purpose to improve the defence capacity the windows are raised high above the ground.
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.