Château de Hierges is a partially ruined castle. The castle, originally called Château de Jerusalem (Castle of Jerusalem) was built on the site of a castrum whose origins date back to the 9th century, when the seigneurie of Hierges was part of the property of the house of Ardenne. At the time of the Crusades, the fortress of Hierges was given to the Prince-Bishopric of Liège and, in the 12th century, the castle was destroyed.
The castle was rebuilt in the 16th century, starting in 1560, with more comfort and openings for firearms. In the 18th century the former common and the dovecote were added. The castle was assaulted by revolutionaries in 1792 and destroyed by fire on 18 November 1793.
Of this Meuse-style Renaissance castle, there remain the curtain walls and three large round partially ruined towers, constructed in red brick and blue stone. The fourth covered tower, semi-circular in blue stone from Givet, is inhabited by the current owner.
On the towers, gun emplacements provided for mutual defence by cross fire. Some windows have cross mullions.
The exterior gardens have been restored to present the appearance they would have had during the Renaissance.
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.