The Château de la Guignardière construction was begun in around 1555 for Jean Girard, panetier, or breadmaster, to King Henri II. It was planned as a symmetrical building, flanked by tall wings. However, in 1563, Girard was assassinated, and the building site was abandoned. The master masons, who had been imported from Paris by Girard, dispersed across the local area, influencing the designs of several buildings in the area.
Further building was not carried out until the 18th century, when Sylvestre, Count of Chaffault, attempted to complete it. Ionic pilasters were added to the principal windows, surmounted by a pediment inscribed with the Count's armorial bearings and the date 1773. Gardens were laid out, and the large pond excavated. However, the Count, a royalist, was forced to flee the country following the arrest of Louis XVI during the French Revolution. During his absence, a republican mob plundered the château, defacing the armorial bearings, and killing the Count's children.
By the early 19th century the château was owned by the Marquis de Saint Denis, a keen agricultural improver. He transformed the gardens, and planted numerous exotic trees, including Magnolia, Swamp Cypress, Zelkova and California Redwood. His successor Henri Luce de Tremont also hoped to complete the château, but instead he chose to move the curved perron stair from the proposed central bay of the garden facade, to the actual central bay. From 1920, the statesman Georges Clemenceau rented a house, known as la bicoque, ('the shack') on the estate. He became friends with the owner, Amedée Luce de Tremont, and was regularly entertained in the dining room of the château. La bicoque is now a state property, and is open to the public as the Maison de Georges Clemenceau. The château remains privately owned, and is now open to the public.
The château is an example of French Renaissance architecture. It comprises a three-bay section of three storeys, the proposed central block, and a tall wing of four storeys. The steeply-sloping slate roofs are supported on the original oak timbers, felled on the estate and dated by dendrochronology to 1556. The roofs are topped by very tall red-brick chimneys. Each window has a mullion and two transoms, made of granite, as are other decorative features. The interiors include large granite fireplaces, probably modelled on published designs by the Italian architect Sebastiano Serlio.
The 86-hectare gardens of the château have been developed as the Parc des Aventuriers, a children's adventure trail and treasure hunt, based on the history of world exploration. Within the park are a number of prehistoric menhirs, as well as more recent garden features.
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.