Husein-paša's Mosque in Pljevlja was built between 1573 and 1594. It was named by Husein-paša Boljanić from the Boljanići village, which was close to Pljevlja. It is regarded as one of the most beautiful sacral monuments of Islamic architecture in Montenegro.
The mosque has a square basis above which there rises a low-pitched dome set on a cubiform pedestal. An open porch covered with three small domes was formed in front of the main façade. A minaret was added close to the southern side. After it being struck by lightning in 1911, it was rebuilt into a slimmer and higher one, which is now the highest minaret in the Balkans.
The interior of the mosque and the porch are decorated with rich, in polychrome painted ornaments with floral motifs and quotations from Quran. Mihrab, mimber and mahvil abound in ornaments made in stalactites and in customary Turkish perforations.
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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.