Schloss Solitude was built as a hunting lodge between 1764 and 1769 under Duke Karl Eugen of Württemberg. Schloss Solitude was originally designed to act as a refugium, a place of quiet, reflection and solitude (thus the name). Construction of the castle was plagued by political and financial difficulties. Karl Eugen had taken Württemberg into the Seven Years' War on the losing side against Prussia. The building exceeded the budget allocated by the duchy of Württemberg. Further, political wrangling between the duke and influential Stuttgart land barons led to the duke moving temporarily from Stuttgart to Ludwigsburg. In the long run, the castle was prohibitively expensive to keep just as a temporary residence. In 1770 it housed a high school founded by Duke Eugen. In 1775, the Karlsschule academy moved to Castle Solitude. It served as an academy of arts, a military academy, and later a general university for children of the elite. Eventually, maintenance costs led to its closure as a school after the Duke's death late in the 18th century. Between 1972 and 1983, the Federal Republic of Germany restored the castle.
Since 1990, the annexed buildings (Officen-building and Kavaliers-building) have housed the Akademie Schloss Solitude. The Kavaliers building incorporates living quarters for students.
Castle Solitude was designed by a working group at the ducal court under the guidance of Philippe de La Guêpière with active input from Duke Karl Eugen and master craftsmen. Its exterior is typical Rococo. On the inside, however, the style is characteristic of classicism: instead of the irregular lively forms typical of Rococo, the proportions of the rooms and wall are typically classical in design.
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.