Reifenstein castle was probably built in the 12th century by the Reifenstein family, a branch of Liechtenstein family. In the 13th and 14th century extensions were completed. 1521, the castle was sold to Sebald Pögl from Thörl and rebuilt in the Renaissance style. 1698 the castle came into the possession of the family Schwarzenberg who still owns Reifenstein lands. The castle was inhabited until 1809. It was damaged during the Napoleon Wars and left to decay.
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.