Abbey Sainte-Marie du Rivet may be founded in the late 8th century. There are some remains of the 9th century fortifications and the abbey church was built in the 13th century. The community is affiliated to the Cistercian order in 1189: at this date, the monastery already bears the name of Sainte-Marie.
The abbey was ravaged during the French Wars of Religion and in 1702 there was only one monk left. In 1938 the abbey came back to life, with a community of nuns. Today, 14 nuns live in the Rivet Abbey. They are Trappistines, that is to say they belong to the Cistercian order of Strict Observance, which is an order stemming from the Cistercians of the Common Observance, themselves from the Benedictines.
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.