Château de Hierges is a partially ruined castle. The castle, originally called Château de Jerusalem (Castle of Jerusalem) was built on the site of a castrum whose origins date back to the 9th century, when the seigneurie of Hierges was part of the property of the house of Ardenne. At the time of the Crusades, the fortress of Hierges was given to the Prince-Bishopric of Liège and, in the 12th century, the castle was destroyed.
The castle was rebuilt in the 16th century, starting in 1560, with more comfort and openings for firearms. In the 18th century the former common and the dovecote were added. The castle was assaulted by revolutionaries in 1792 and destroyed by fire on 18 November 1793.
Of this Meuse-style Renaissance castle, there remain the curtain walls and three large round partially ruined towers, constructed in red brick and blue stone. The fourth covered tower, semi-circular in blue stone from Givet, is inhabited by the current owner.
On the towers, gun emplacements provided for mutual defence by cross fire. Some windows have cross mullions.
The exterior gardens have been restored to present the appearance they would have had during the Renaissance.
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.