The foundation of the castle on the island of Pantelleria can possibly traced back to the Arab or Byzantine period in Sicily, even if it is not attested with certainty before the 13th century.
The Castello Barbacane is located in the centre of Pantelleria town at the entrance of the old harbour and is accessed via a staircase from the Via Castello. It was a bulwark to protect the maritime trade of the island, facing the harbour on one side and walls lapped by the sea on the other side. Until just over a century ago, the castle was the predominant element of the walled city
The castle is well preserved and worth a visit.
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.