The Château de Belzunce is a ruined castle in the commune of Ayherre. Its construction dates from the 13th, 14th and 16th centuries
The castle has a trapezoidal plan flanked by four towers, representing two periods of construction, the Middle Ages and the 16th century. During the 16th century, it was redeveloped and finally ruined. During the French Revolution, it was sold as national property. It appears to have been used as a stone quarry. Neighbouring buildings and the outer fortifications survive only as foundations. The castle is notable for the Belzunce family. François de Belzunce was Bishop of Marseille at the beginning of the 18th century and the Marseille district of Belsunce was named by him.
It is privately owned and has been registered since 1992 as a monument historique by the French Ministry of Culture. It is not possible to visit the site, but it may be clearly seen from the road.
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.