Located at 89 meters in height, the Pedres castle was built between 1296 and 1322 during the Pisan-Aragonese domination period during the ascent of the Visconti family. It is characterized by two squares, one upper and one lower, surrounded by polygonal walls, reachable through stairs built with large granite boulders. Its position allowed to control the territory up to the Gulf of Olbia.
In 1339 the castle was entrusted to the hospital friars of Saint John of Jerusalem. From the second half of the fourteenth century it was occupied by the Aragonese and then by the Giudicato of Arborea. The castle met a definitive abandonment at the beginning of the fifteenth century, coinciding with the decline and depopulation of Civita.
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.