Cly is a castle in Saint-Denis, overlooking the Dora Baltea river, belongs to the so-called primitive style of castle, consisting of a keep with a surrounding wall. The ruins rise from a bed of metamorphic rock, on the edge of a fault line which extends to the Castle of Quart.
Cly was first mentioned in a document from 1207, in which the 'chapel sancti Mauricij de castro Cliuo' is mentioned among the goods of the Vicarage of Saint-Gilles in Verrès, but the keep has been dated to 1027 using an analysis of the tree rings in its timbers (dendrochronology). Originally a fief held from the Counts of Savoy, in 1376 the direct ownership passed to the Duchy of Savoy, which installed a castellanto administer it for them until abandoned in 1550. The castle fell to ruins in the centuries that followed.
Eventually the castle ruins became the property of the nearby town of Saint-Denis. The castle is visible atop the hill overlooking the town of Chambave. The castle is open to guided tours only in July and August.
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.