Matrera Castle was built in the 9th century by Omar ibn Hafsún to defend Iptuci, the most advanced city of the Cora de Ronda. However, Mount Pajarete was a place of human settlement since Antiquity.
In the 13th century, it was conquered by San Fernando, who rebuilt it. Nevertheless, at the beginning of the XIV century, it returned to Muslim hands, being definitively reconquered by Alfonso XI in 1341. However, being located in the middle of the Moorish Border or Band was besieged by the Muslims of Granada in 1408 and in 1445.
By 2010, only a few walls of the castle remained standing, and the ruins were further damaged by rain in 2013. A restoration project was launched in 2010 and completed in 2015. Parts of the tower were rebuilt with lime plaster similar to samples found on the site, with large, plain blocks defining the original shape of the castle.
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.