San Andrés church was built in the quarter of Ajates (a suburb of mediaeval origin in which the main trade was masonry) in the second quarter of the 12th century. It was made in Caleno granite (very typical of the Romanesque style in the town) and is set according to liturgical criteria with an upper end with three apses that correspond to the three naves in the interior; it does not have a transept nave. The protruding central apse is of particular interest thanks to the number of figures and capitals and the closed arches on the straight section of the upper end, which stand as a unique example of Romanesque capitals. The variety of icons on the interior and exterior capitals is the largest of all of Ávila's Romanesque buildings and is associated with the Masters of León. The central apse has two absidioles of a smaller size and a plainer composition.
The upper end is covered with decreasing stepped vaults: barrel vaults along the straight section and calotte vaults along the curved section. The southern absidiole has a lobulated arch used as the entrance and unparalleled in any other church in Ávila at the time.
The south front has a semi-circular window and the keystone of the semi-circular archivolt contains a Chi Rho which, fitted in the 13th century, is considered as the first of its kind in the town. The tower stands next to the western side, built onto the nave during or after the 14th century.
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.