Santa Olalla del Cala Castle stands on a prominent rocky ridge above the village. The fortress, although the ramparts are reminiscent of Moorish castles, was built by the Christian king of Castile, Sancho IV in the thirteenth century replacing a much smaller fortress which had been built earlier by the Muslim rulers of Andalucía. The Muslim structure is thought to have been built on top a much early Roman fortification. The castle was part of a defence system built to protect the city of Seville from the Portuguese. This defence system was called the Banda Gallega or The Galician Band. The system composed of three lines of defence, which mostly utilized older Moorish fortresses. The first line contained the castles of Aroche, Encinasola and Fregenal de la Sierra. In the second line was the Torre of San Bartolomé and Cortegana castle. The third line included Santa Olalla del Cala and the fortress at Aracena.
The castle is constructed from stone masonry and brickwork. The curtain walls have ten towers in total. Four of the towers are circular and the other six are rectangular in shape. The towers are constructed of solid stone and rise to the height of the parapet at which there is a vaulted chamber. This is topped by battlements of which some have pyramidal and brick cube castellation. The inner precinct is of an irregular coffin shape and follows the plan of the ridge top of the hill. On the North West elevation there is an entrance tower which is turned 90° to the main curtain wall of the fortress.
Following the castle’s decline as a fortress other uses were found for the stronghold. In the 19th century and into the 20th century the castle precinct and curtain walls were used as the municipal cemetery. The walls were pierced to form burial niches. This had a detrimental effect on the castle, considerably weakening the structure. In 1949 the castle was declared a site of cultural interest and measures were taken to preserve the site.
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.