The Basilica of St Michael was built between the end of 14th century and the 16th century. It is at the heart of the ancient quarter of Saint-Michel.
The pulpit represents Saint Michael slaying the dragon. The stained-glass windows were destroyed during the bombardment of 1940. The separate bell tower, which is 114 meters tall, was built in the 15th century. The tower can be visited every day from April to October.
From the late eighteenth century until 1979, over 60 of the mummified bodies were exhibited in the crypt. In 1881 a Gallo-Roman cemetery and catacombs were discovered under the tower, with several naturally mummified bodies. The mummies were found in 1791 according to other sources, in the adjacent parish graveyard which, having become full, was being cleared, with remains being transferred to catacombs; they further state that the bodies were removed to the cimetière de la Chartreuse in 1979.
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.