Ennsegg castle was built originally around the year 900. In the end of the 15th century it was so dilapidated that the Emperor Frederick III decided to build a new one. This imperial residence stood only for 100 years. Already in 1565 it was rebuilt again. The next expansion was made in the mid-1600s.
Todau Ennsegg castle has two courtyards separated by a longitudinal wing. In the arcades are Roman finds from Lauriacum (Lorch). The castle chapel dates back to the second half of the 17th century. It was installed in a defensive tower. It is richly decorated with stucco decoration. The altar was erected around 1800.
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.