Built in 1631 by the celebrated architect François Mansart (1598-1666) at the request of Jean de Choisy, the Château de Balleroy and its surrounding buildings are one of the first urban plans that inspired other chateaux, including Versailles. All the buildings were built from scratch. The chateau itself has retained almost all of its original features and it is because of this that it witnessed the major innovations of the 17th Century.
In 1970, Malcolm S. Forbes, owner of a major U.S. newspaper group acquired the chateau which was then fully restored and refurbished. Today, his four sons and his daughter continue his work.
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.