The origins of the present Chelva town can be found in the 11th century, when the ruling Moors established a fortress. The original city center was developed adjacent to the castle. It was enclosed by a wall with four gates (one is still visible, San Cristobal). Because of these fortifications, Chelva was a town of considerable importance during the Muslim rule.
The castle was converted as a palace where the Viscount of Chelva stayed from the late 14th century. The building evolved architecturally, eventually presiding over the Main Plaza. An Iberian occupation from the 4th century B.C. has recently been discovered, and the location of Chelva’s first Christian church within the castle walls from the 13th century has been confirmed.
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.