Prudnik Castle was located in the defensive bend of the Prudnik river. It was built in 1255. It was founded a Czech knight Wok of Rosenberg.
The castle was destroyed in 1428 by the Hussites. After the end of the first Silesian War, Frederick the Great rebuilt the castle.
A fire on 27 August 1806 burnt the entire castle except of one tower called 'Wok's Tower', which is now the only remnant of the castle.
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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.