The Royal castle of Děvín was obviously founded at the locality of a previous fortress in the middle of the 13th century. King Wenceslas II gave it to Jan of Michalovice in 1283.
During the 1359 - 1516 period it was (with several breaks) in the possession of the noble family from nearby Stráž (Vartemberk). Then it was purchased by the Biberštejn family who had it renovated. In 1645 it was damaged and burnt by Swedish troops, which is the end of its history.
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.