St David's Church is a redundant church sited in a round churchyard adjacent to the junction of the A449 and A472 roads. The church stands in a churchyard that is almost circular, and is surrounded by a bank and the traces of a ditch.
The first record of a church on the site is in 1254. However the present church dates mainly from the 15th century and it was probably originally dedicated to Saint Cyfyw.
St David's is constructed in stone rubble and has stone tile roofs. Its plan consists of a nave and chancel, with a west porch. On the east gable is a cross finial, and on the west gable is a bellcote. The bellcote has two triangular openings; the bells were dated 1598 and 1688, but only one of these was still present by 1999. On the south side of the church are three windows in Perpendicular style; there are no windows on the north side. The east window has three lights. At the east end of the nave on each side is a buttress, and there is a Tudor arched door on the south wall of the chancel.
The church has a unrestored interior with 18th-century fittings. The walls are plastered and whitewashed; the pointed chancel arch is also plastered. The frame and the front of the loft of the original 15th-century rood screen are still present. There is a set of pre-Victorian box pews. These include a large squire's pew, above which is a monument to William Jones who died in 1829. The pulpit is five-sided, and the communion rail is supported by turned balusters. There are stone benches along the east wall and a small, damaged piscina in the south wall. The font is square on a square base. On the floor of the nave and the chancel, and on the north wall, are memorial slabs.
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.