The Karlevi Runestone, designated as Öl 1 by Rundata, is commonly dated to the late 10th century. It is one of the most notable and prominent runestones and constitutes the oldest record of a stanza of skaldic verse.
The runic inscription on the Karlevi Runestone is partly in prose, partly in verse. It is the only example of a complete scaldic stanza preserved on a runestone and is composed in the "lordly meter" the dróttkvætt. It is notable for mentioning Thor's daughter Þrúðr and Viðurr, one of the names for Odin, in kennings for "chieftain." In the second half of the stanza a reference is made to Denmark, but it is not clear what exactly this means in this poetic context.
The stone is contemporary with the Battle of the Fýrisvellir and it is consequently possible that the stone was raised by warriors who partook in it, in memory of their lord. The inscription, which is on a granite stone that is 1.4 meters in height, is classified as being in runestone style RAK. This is the classification with inscriptions with runic text in bands that have no attached dragon or serpent heads and the ends of the runic bands are straight. The non-runic inscription on the reverse side appears to be accompanied by a small Christian cross and a Norse pagan Thor's hammer, or Mjöllnir.
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.