The Skopje Fortress, commonly referred to as Kale, is situated on the highest point in the city overlooking the Vardar River. The fortress is depicted on the coat of arms of Skopje, which in turn is incorporated in the city's flag.
The first fortress was built in 6th century AD on a land that was inhabited during the Neolithic and Bronze Ages (roughly 4000 BC onwards). It was constructed with yellow limestone and travertine, along with fragments of Latin inscriptions. Material for the fortress originated from the Roman city of Skupi, which was completely destroyed by an earthquake in 518.
The fortress is thought to have been built during the rule of emperor Justinian I and constructed further during the 10th and 11th centuries over the remains of emperor Justinian's Byzantine fortress which may have been destroyed due to a number of wars and battles in the region. The city was capital of the First Bulgarian Empire between 992 and 1015, and was center of the uprising of the Bulgarian Empire against the Byzantine Empire under the rule of Peter Delyan. Not much is known about the Medieval fortress apart from a few documents which outline minor characteristics in the fortress' appearance.
In 1346 at the Skopje Fortress, Stefan Dušan adopted the title of Emperor at his coronation and he had transferred the capital of Serbian Empire to Skopje.
The fortress was partially destroyed yet again by an earthquake in 1963 but was not reconstructed until recently.
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.