The history of the Czchów Castle dates back to the 13th century, when a Romanesque watchtower was built here. In the 14th century, a defensive castle was added to the tower. It became the residence of the Czchów starostas, and was destroyed in the Swedish wars of the mid-17th century. Finally, the castle lost its military importance, and was turned into a prison, which was closed in 1772, after the first partition of Poland. Currently, the only remaining parts of the complex are a 14th-century tower and foundations of the defensive wall.
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.