Bitche is known for its large citadel originating from a castle built at the beginning of the 13th century.
The citadel, which had been constructed by Vauban on the site of the old castle after the capture of Bitche by the French in 1624, had been destroyed when it was restored to Lorraine in 1698. This was restored and strengthened in 1740 into a fortress that proved impregnable up until the 20th century. The attack upon it by the Prussians in 1793 was repulsed.
During the Napoleonic Wars, 1804-14, the citadel at Bitche became a major prisoner of war camp housing British and allied soldiers and sailors. It was also used in this context as a penal camp, housing repeated escapers and recalcitrant prisoners.
The fortress is noted for its resistance during the Franco-Prussian War. Louis-Casimir Teyssier, its commander and chief, held the place for about eight months with 3,000 men against about 20,000 Prussian and Bavarian soldiers until the French government ordered him to surrender after the ceasefire in 1871. The town became part of Germany after that date until the end of the First World War, when it was given back to France. During the Second World War it was annexed by the Third German Reich (1940–1944).
Citadel of Bitche is a perfect example of military fortification from the 17th and 18th centuries with its singular design and advanced techniques. A large screen cinema in the underground galleries shows extracts from The Besieged Fortress.
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.