The current Węgorzewo town was first mentioned in a 1335 chronicle as Angirburg, or 'eel castle', a settlement of the Teutonic Knights with a block house, a palisade, and a watchtower. The Grand Duke of Lithuania, Kęstutis, destroyed the wooden castle in 1365. Teutonic Knights built new brick castle in 1398. It was situated 2 km away from burnt castle on river island. Near by the castle grew settlement New Village which got allocation privilege in 1514.
From 1525 the castle was a residence of princely district. In 1734 and 1736 King of Poland Stanislaw Leszczynski visited the castle. After World War II the town was burnt by Russian soldiers and the castle was destroyed. It was rebuilt in 1980's.
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.