Krumau Castle sits beautifully on a rock near the centre of the village next to the river Kamp. Krumau Castle was first mentioned in 1172. The castle became the summer residence for Queen Margarethe of Austria after she was banished by her husband King Pfzemysl Ottokar II of Bohemia in 1261.
Later the castle was damaged during sieges, most notably in 1619. After which it was rebuilt in 1667/1668. From the 18th century on however, the castle fell to ruin. From 1959 on the castle was partially rebuilt.
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.