The original square form castle in Ivry-la-Bataille was built around 960 AD. It was 32x25m wide stone building with a small chapel. Today the first floor of this castle remains and it is the oldest medieval building in Normandy. The castle was enlarged during the next centuries. In the Hundred Years' War it was conquered by English (1418), but moved back to the hands of French (1424). After 1449 the castle was left to decay. The restoration began in 1968.
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.