Halk church is a whitewashed church with a lead covered roof, which consists of a Romanesque choir and nave. Later, an expansion towards the west was added, as well as a sacristy, weaponhouse, chapel and an east facing tower, which is rarely seen.
The alter tablet is a beautiful combination of parts from a late-gothic alter tablet, which has been inserted into a late-renaissance frame from around 1640.
The church has an unusually large amount of fixtures from the Middle Ages, including beautiful sitting Mary with child from ca. 1275. There is also a crucifix from the same era, with side figures, where Mary is original, while John is from the 1400s. A canopy tablet with the crowned and blessing Christ dates from ca. 1400. A processional crucifix is from the first quarter of the 1500s.
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.