The castle was built by the Boçari family, one of the principal Albanian families of Tragjas, in the 16th and expanded in the 17th century. Modern members of the family include Markos Botsaris, Katerina Botsari Kito Bocari, Gëzim and Ismail Boçari. The fortification features arrowslits for artillery openings in the walls. The northern and eastern corners of the castle feature large towers. The stone walls form a rectangle surrounding the courtyard and have a width of 1.25 metres and a height of 5.5 metres.
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.