The Château de Gavaudun on the river Lède. It was built on a rocky spur and overhangs the river. The lofty 13th century keep rises 25m above the level of the rock. The castle was built during the 12th and the 13th centuries, on the main road between Périgord and Agenais. The bishop of Périgueux besieged it and destroyed it for the first time in 1165.
During the Hundred Years' War it was of central importance in the conflict between England and France. In the 15th century, the castle changed families through a marriage. It was recovered by the town of Gavaudun in 1796 in poor condition. Today, the donjon tower of the castle has been protected and listed since 1862.
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.