Stary Dzierzgoń was one of the first Teutonic fortresses in the territory of Prussia.The castle was built in 1234 on the site of a Prussian stronghold. It was devastated in 1243 and abandoned in 1247 when the Teutonic Order moved its seat to the brand new castle in nearby Dzierzgoń. The outline of the moat and the embankments are the only remains of the fortress.
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.