The original castle in n a rocky spur was supposedly built in 413 by the Visigoths on the side of a mountain, defended by almost inaccessible cliffs. This fortress controlled the Arnette and the Thoré valleys, overlooking the plain where the town of Mazamet now stands.
Pierre-Raymond de Hautpoul is the first known lord of Hautpoul (mentioned in 1084). He rebuilt the castle, constructed the town walls and built the fortified church of Saint-Pierre d'Hautpoul. He accompanied his suzerain Raymond IV of Toulouse on the First Crude to the Holy Land in 1098.
In the 13th century, the lord of Hautpoul and Auxillan was Izarn d'Hautpoul. He reputedly adopted the Cathar faith. The castle and town was besieged by Simon de Montfort in 1212 during the Crusade against the Cathars of the Languedoc. The town was occupied and burned. Its fortifications were destroyed. However the survivors seem to have returned to Catharism as soon as the Crusaders left.
Around 1560, Huguenots (French Protestants) appeared in the region. The castle was besieged again during the wars of Religion between Catholics and Huguenots.
Today, you can still see the long village of Hautpoul winding down the hillside, along with the vestiges of upper and lower castles. At its foot, the river Arnette still winds, and its waters are still perfect for making wool. The old lower town gate has been restored, with its meurtrière. The village is being rejuvenated: picturesque old houses are occupied by craftsmen and their workshops.
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.