Elbasan castle is a 15th-century fortress, initially composed of 26 equidistant 9-metre high towers. The site seems to have been abandoned until the Ottoman army built a military camp there, followed by urban reconstruction under Sultan Mehmet II in 1466. Mehmet constructed a massive four-sided castle with a deep moat and three gates. He named it Elbasan, meaning 'conquered country' in Turkish. He had built the castle in order to fight Skanderbeg, due to an ongoing conflict between the Ottomans and Albanians.
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.