Church of Santa Eulalia of the Monastery of Arnoso was originally founded in the 7th century on the initiative of San Frutuoso, Bishop of Dume and Braga. It was destroyed by the Moors in the 11th century. It was later rebuilt by King García II of Galicia.
It is a simple church in early Romanesque style with a nave, a barrel vault and a rectangular apse with blind arches. The wooden portal consist of round arches and a tympanum with a cross pattée. These round arches are profusely decorated with geometric, intertwined and zoomorphic elements.
Inside the church there are a few sixteenth century frescoes with episodes from the life of Our Lady. The two crosses on top of the roof show some similarities with Celtic crosses.
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.