Jerez de los Caballeros Castle dates back to the 13th century. The castle stands on the western part of a hill, around which the town of the same name extends. Since the Neolithic it was inhabited by Phoenicians, Celtic Betures, who were initially known as 'Ugultiniacum', Romans, Visigoths, Muslims and chivalric orders such as the Temple and Santiago settled chronologically in these territories.
The current castle was built by the Templars, who refused to lay down arms when the order was suppressed, and came to a sticky end. You can wander around at will, but it's basically just the impressive walls that are preserved, with pretty gardens dotted around.
References: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.