Strategically located at the entrance into the Borjomi Gorge and guarding the road from eastern to western Georgia, Surami town became a heavily fortified town in the 12th century. From the 1170s to the latter part of the 14th century, the fortress of Surami was a hereditary fief of the dynasty of the eristavs (dukes) of Kartli.
Subsequently, Surami declined but retained its lively trading post as well as the fortress which was reconstructed in the 16th and 17th centuries. By the mid-18th century, according to Prince Vakhushti, Surami had 200 households of Georgians, Armenians and Jews. In the 1740s, Surami was used by Prince Givi Amilakhvari as his base against King Teimuraz IIand Persians. After the prince’s surrender in 1745, the fortress was demolished, but later restored and exploited by the Russo-Georgian troops in anti-Ottoman operations during the Russo-Turkish War (1768–1774).
After the Russian annexation of Georgia in 1801, Surami housed a military post and was later popularized as a mountain climatic resort.
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.