Aspelt Castle is a Baroque residence built in 1590 on the site of a medieval castle. The origins of Aspelt Castle date back to the 11th century when a fortified castle with a moat was built on the site, possibly on Roman ruins. The first written reference to the castle can be found in Theoderich von Wied's Echternach chronicles from 1132. The foundations of the round Gothic towers are probably from the 14th century while the current building was completed in 1590 following transformations carried out by the Ruelle, Kempt and Burthé families. In 1777, the Martinys extended the palace and installed new Baroque windows in the towers. In 1957, the ground floor of the south-west tower was restored.
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.