Halaesa was an ancient city of Sicily, situated near the north coast of the island. The city was of Siculian origin; in 403 BC the tyrant Archonides of Herbita, having concluded peace with Dionysius I of Syracuse, gave the northern part of his territory to the Sicilians as well as to mercenaries and others who had helped him during the war. He named it Halaesa, to which the epithet Archonidea was frequently added for the purpose of distinction. Others attributed the foundation of the city erroneously to the Carthaginians.
It quickly rose to prosperity through maritime commerce. At the start of the First Punic War it was one of the first of the Sicilian cities to submit to the Romans to whose alliance it was always faithful. It was doubtless to this conduct and to the services that it was able to render to the Romans during their wars in Sicily that it was awarded the status of civitas libera ac immunis which gave it the privilege of retaining its own laws and independence, exempt from all taxation, an advantage enjoyed by only five cities of Sicily. In consequence of this advantageous position it rose rapidly in wealth and prosperity and became one of the most flourishing cities of Sicily.
The city appears to have subsequently declined, and had sunk in the time of Augustus to the condition of an ordinary municipal town, but was still one of the few places on the north coast of Sicily which Strabo deemed worthy of mention.
The site has been partially excavated starting in 2017. The agora and theatre are among the monuments so far been brought to light. Portions of the aqueduct can be seen and fragments of statues, as well as coins and inscriptions, have been frequently discovered on the spot.
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.