Montalto Dora Castle was built in the first half of the 12th century on top of Monte Crovero reflecting in the waters of Lake Pistono, being first mentioned under the name of castrum monsalti in a document dating from 1140.
During the 14th and 15th century, the castle was modified and enlarged to better serve from a defensive viewpoint.
In the 19th century, the castle was renovated under the direction of architects Carlo Nigra and Alfredo d'Andrade, who also used it as a model and source of inspiration when designing the Borgo Medioevale in Turin.
In 1963 the Castle became property of the Allioni of Brondello family. From 1965 to 1985 they proceeded to restore the buildings inside the walls, and to enhance the park.In the last years, the current owners have gone on completing a functional restoration of internal and external spaces, along with several enhancing works for the whole park and its vegetation.
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.