The construction of the Teutonic Castle in Dzierzgoń began in 1248, as ordered by the national champion Heinrich von Wida. At its location there was chosen towering hill over the area, where previously was a fortified city of Prussia, to protect the settlement lying at its feet. The fort was the seat of the Commander of Dzierzgoń, who also held the function of the Quatermaster (Obersttrappier) in the Order of the Teutonic Knights. During the heyday of the Teutonic Order Dzierzgon castle was considered to be in possession of the largest arsenal of weapons comparing to Malbork castle and the second largest Brodnica granary.
During the war of Polish and Teutonic Knights between 1409-1411, the the Dzierzgoń's monks took part in the battle of Grunwald, under the leadership of Commander Albrech von Schwarzburg. Their commander was killed in combat.
By the way of Polish forces at Malbork, the Polish King Władysław Jagiełło entered Dzierzgon and stayed at the castle. Here the King received a delegation from the Prussian towns, including Elbląg, which gave him a tribute of fidelity. In 1411 the castle was conquered by the Teutonic Knights. 42 Commanders served their role at the Dzierzgoń castle, among many of them later became the great masters of Teutonic Order. The Poles burned down the castle in Dzierzgoń twice during the war with the Teutonic Knights in 1410 and 1414. Under the peace treaty of Toruń in 1466, the castle was returned to Poland, becoming the seat of the mayor and the municipal court.
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.