The Castle Church of Schleiden, a late-gothic three-nave hall-church with an interesting net-and-star vault, was built between 1516 and 1525 according to the plans of Johann Vianden. This Castle Church is the Catholic parish church today. On the end walls of the side aisles are precious glass paintings from 1535, a valuable König organ (constructed around 1770) and a sarcophagus made of black marble. Equally remarkable are the late-gothic glass windows, the vault paintings and the Flemish altar wing.
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.