Rosenburg Castle was built in the 12th century by the Counts of Riedenburg. It has been rebuilt and extended many times, right up to the present day.
In the Peasants' War , the castle was conquered in April 1525 by rebels and largely destroyed. A reconstruction took place between 1556 and 1560. In the Thirty Years' War the castle 1632-1634 was sacked several times. During the War of Spanish Succession Rosenburg was conquered by the Austrians.
The well maintained property now serves as a castle museum.
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.