The origins of Oberranna Castle are unknown, but it existed already in 1070. Leopold III, Margrave of Austria, built Leopold III, Margrave of Austria, built an independent Romanesque fortified church adjacent to the castle. The castle was enlarged to the current size in 1560 by Georg von Neidegg.
Oberanna Castle has never been conquered and is well-preserved. Today it is private owned.
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.