Våler church was built between 1150 and 1200. The restorations were made in 1714, 1867 and 1961-63. One of the church bells is probably cast before 1160 while the other dates from 1799. Other treasures include a crucifix from the mid-1200s (from Limoges in France) and organs from ca. 1781 (built by Niels Samuelsen Dæli). The altarpiece and pulpit were a gift from cicar Peder Hansøn Prydz and his wife Karen Olsdatter in 1636.
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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.