The Church of San Juan de Berbío probably belonged to the monastery founded by Alfonso V in 1005; the Infanta Doña Urraca donated it to the Monastery of San Pedro de Eslonza in 1099.
The structure went through several redesigns in the fifteenth and sixteenth centuries. The most extensive was in the eighteenth century, which added square heads and porch trim. Of the original Romanesque design, all that remains are the basic building layout, the western facade double archivolt and bows and starts from the original facade. Until 1892, it was the parish church for Infiesto.
The church was destroyed by fire in 1936, during the Civil War, in which the eighteenth-century altarpiece was also burned.
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.