The original church was erected in 1150 over a roman temple build in honor of the goddess Cybele, the mother-God. Three times destroyed, three times has been rebuilt.
In 1363, a fire completely destroyed the church. In 1600 it was partially destroyed in a cyclone before succumbing to the earthquake in 1755. Queen Maria I of Portugal, in 1783 ordered to rebuild the church again.
The Vestibule of this church, in manueline style is considered one of the workmanships of its time.
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.