The Church of St Bridget has medieval in origin, with the earliest parts believed to date from the reign of King John (1166–1216). It was extended in the fourteenth and again in the sixteenth century, sympathetically restored in 1896 and again in 1909–10.
The church is constructed of Old Red Sandstone. It comprises a two-aisled nave, chancel and a West tower. The tower is topped by a dovecote belfry with a pyramidal roof.
The interior contains the very fine chest tomb of John Morgan, died 1557, who was Member of Parliament for the Monmouth Boroughs, Steward of the Duchy of Lancaster and last Governor of the Three Castles, of Skenfrith, Grosmont and White Castle.
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.