The construction of Gerione Castle was probably motivated by the need to control mountain routes and its strategic position as an observation point for a large part of the Sele plain. Documented for the first time in a parchment from 1056 during the Lombard period, the exact date of its construction is unknown.
With the Assise of Capua in 1220, the Gerione Castle was acquired by Frederick II of Sweden for the Demanio Regio, becoming directly dependent on the emperor and included among the Castra exempta, the main fortifications of the kingdom.
The structure maintained its military-defensive function until 1515 when, due to its inconvenient location for the needs of the time, it was handed over to the Collegiate Church of Santa Maria della Pace by the last feudal lord to possess it, Duke Ferdinando Orsini. According to others, the castle was used both as a prison and as a Spanish garrison during the feudal rule of the Grimaldi Princes of Monaco, Marquises of Campagna.
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.