The Bip Castle was constructed in 1795-1797 under the project of architect V. F. Brenna by the order of emperor Paul I. There were remains of old sweden fortification on the place of construction. This place is rather convenient for such kind of buildings. The Castle was included in the military register of fortresses of the Russian Empire and there was small garrison under command of commandant Arakcheev. The drawbridge was lifted at the sunset and gun fired a shot on midday.
After Paul's I death various institutions had accommodation here such as the School for deaf children, Clinic of cavalry regiment, Aleksandrovskij college, Pavlovsk city board. After October 1917 coup d’etat there were orphaned house, military komissariat, sovdep(local council of 'peoples' deputies). During WWII the Bip Castle has burned down, but today it is restored as a hotel.
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.