Canosa 'castle' is actually the acropolis of ancient Castrum Canus. The three great towers are the ruins of the eponymous estate located atop the hill overlooking the valley Ofantina. Originally a place of worship and pre-Roman fort, built of tufa blocks was rebuilt as a bastion of the same materials by the Grimaldi. Last owners, from 1856, were the Prince of Canosa Capece Minutolo of Naples, and remained until 1948. The wear of the blocks that compose it and the color denotes the passage of these various civilizations that have developed the structure in different epochs. The castle has also reported damage after the devastating bombing of the Second World War. Along the steep hill of the Acropolis, there is the old part of the country, with its narrow streets and staircases. At the southern base lie the remains of a Roman amphitheater.
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.