The existence of a fortification at the site of Mehun-sur-Yèvre dates from antiquity. The major remains are of the early 13th century and the later 14th century. The present standing ruins date from a castle founded under the Courtenays after 1209. This fortress was transformed into a princely residence by John, Duke of Berry in 1367. Largely ruined in the 18th century the castle represented an excellent example of late Gothic architecture and early Renaissance architecture. Charles VII of France, died in the castle on July 22, 1461.
The castle is built on a trapezoid plan, and originally had a tall cylindrical tower at each corner and a rectangular tower in the middle of one of the long sides. An entrance was formed in the wall between two of the towers. One tower (12m diameter) was much larger than the others (8m) and served as the keep. The keep and the west tower still stand to their full height, each capped with intricate defensive machicolations. Manuscript illustrations indicate that the castle also had a large chapel above the principal entrance.
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.