The Church of the Trinity and San Giovanni is a Romanesque and Pisan-style building from the 11th century. In the church's chapel, two murals depicting Doctors of the Church and Saint George slaying the dragon date from 1449 and 1458 respectively. In 2011, an archaeological evaluation was carried out on the church's nave in favor of a restoration campaign.
Like the chapels at Montegrosso and Lumio, the chapel is located in the center of the cemetery and is decorated with human and animal figures (including bears, oxen and snakes). One example is in the pinion in the vertical alignment of the door: it depicts a man removing a thorn from his foot; this is an allegory of knowledge and is fairly widespread in Romanesque buildings.
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.