Fort Napoleon in Ostend is a polygonal fort built in the Napoleonic era. It has recently been restored and is open to the public.
France had occupied the Austrian Netherlands (a territory roughly corresponding to the borders of modern Belgium) during 1792 and 1793 in the Flanders Campaign of the French Revolutionary Wars. During the War of the Fifth Coalition, Napoleon Bonaparte expected a British assault from the sea on the port of Ostend, and the fort was constructed in the sand dunes close to the mouth of the harbour in 1811. The British attack never materialised and the fort was used as for troop accommodation and as an arsenal until the end of the French occupation in 1814 when it was abandoned.
During World War I, the fort was used as accommodation for a German headquarters, and decorated with murals by German soldier Heinrich Otto Pieper. The heavy coastal artillery battery Hindenburg was stationed nearby. It was armed with four 280 mm guns of 1886-1887 vintage in heavily armored turrets on semi-circular concrete platforms. It was captured by the Belgian army in 1918.
The fort was also used as German artillery headquarters during World War II. After the war, it served as a museum and then a children's playground before falling into decay. In 1995, the fort was restored and opened to the public in 2000.
References:The Clementinum is a historic complex of buildings in Prague. Until recently the complex hosted the National, University and Technical libraries, the City Library also being located nearby on Mariánské Náměstí. The Technical library and the Municipal library have moved to the Prague National Technical Library at Technická 6 since 2009. It is currently in use as the National Library of the Czech Republic.
Its history dates from the existence of a chapel dedicated to Saint Clement in the 11th century. A Dominican monastery was founded in the medieval period, which was transformed in 1556 to a Jesuit college. In 1622 the Jesuits transferred the library of Charles University to the Klementinum, and the college was merged with the University in 1654. The Jesuits remained until 1773, when the Klementinum was established as an observatory, library, and university by the Empress Maria Theresa of Austria.