The first historical mention of the Persenbeug Castle dates from 970 AD when Bavarian Count of Semt and Ebersberg took possession of site and fortified it. Until 1593 it was owned by the Austrian imperial house. Then it went to the Hoyos family. The current appearance dates mainly from the 16th century. In 1800 Emperor Franz I of Austria bought the castle and the Persenbeug estate as a free private property. Today Persenbeug can be rented for events such weddings and parties.
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.