Hohenstaufen Castle was seat of the now-defunct House of Hohenstaufen. The castle was built around 1070 by Frederick I of Hohenstaufen (even before he became Duke of Swabia), as a fortress to protect family interests in the vicinity. Until the 13th century, the castle was a possession of the imperial and royal family, the Hohenstaufen dynasty. In 1181, Emperor Frederick Barbarossa stayed there; in 1208, Irene Angelina, the widow of Barbarossa"s son, the recently murdered Philip of Swabia, died at Hohenstaufen Castle.
After the fall of the Hohenstaufen in 1268, the castle was declared an imperial possession by the Habsburg king Rudolf I of Germany. The strategically and symbolically important location was a constant bone of contention between the Counts of Württemberg and the Holy Roman Emperor.
In 1372, Hohenstaufen Castle finally was in the hands of the Württemberg rulers. After the expulsion of Duke Ulrich of Württemberg by the members of the Swabian League in 1519, one Georg Staufer of Bloßenstaufen successfully claimed the castle, as a descendant of the old Hohenstaufen dynasty. Therefore, only a small force defended the castle in 1525, when it was taken and destroyed by insurgents during the German Peasants" War. Stones from the castle were later used in the construction of the Renaissance Göppingen Castle.
Since the German unification of 1871, Hohenstaufen Castle has been regarded as a national monument. The archaeologist Walther Veeck undertook excavations on it between 1936 and 1938, and further excavations were made between 1967 and 1971, uncovering and securing the castle foundations. A Hohenstaufen memorial stele was inaugurated in 2002. In 2009 additional work was done to preserve the site.
The Staufer Museum, located at the intersection of Pfarrgasse and Kaiserbergsteige in Hohenstaufen, contains artifacts from and historical information about the site. The trail that leads to the castle site starts between the two churches that are adjacent to the Staufer Museum.
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.