Senftenberg Castle was mentioned first time in 1197. In the 13th century it belonged to the Zebringer family and between the 14th and 15th centuries to the Wallseern family. The castle was destroyed during the rebellion in 1407-1409 and rebuilt later. It was a refuge place during the Siege of Vienna in the Ottoman Wars. The castle was finally destroyed by the Swedish troops in the Thirty Years' War in 1645. Today still impressive ruins with three gates and square keep exist.
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.