The Château d'Aurignac was built on a hill before 1240 by Bernard V, Counts of Comminges, and the village developed around it. Henry IV ordered the destruction of the castle in the early 17th century and, although it was still partly inhabited in 1627, it fell into disuse not long afterwards. All that remains today are the church, a well-restored keep on the peak of the hill and some of the ramparts, which have been incorporated into houses.
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.