The Château de Groussay was built in 1815 by the duchesse de Charest, a daughter of Louise Elisabeth de Croÿ-Havré, marquise de Tourzel, the governess of the royal enfants de France of Louis XVI and Marie Antoinette.
The Château was purchased in 1938-39 by the French aesthete Carlos de Beistegui, who enlarged it, with the professional help of Emilio Terry. Cecil Beaton's inspiration for Henry Higgins' library in My Fair Lady was the library at Groussay.
Beistegui created new gardens, inspired by the Anglo-Chinese gardens of the 18th century and by an 18th-century copper tent in the royal gardens of Drottningholm Palace in Sweden. They feature a Chinese pagoda, a labyrinth, a theater of verdure, a Tartar tent, and other follies. The Gardens are classified by the French government as one of the Remarkable Gardens of France.
References:Rosenborg Palace was built in the period 1606-34 as Christian IV’s summerhouse just outside the ramparts of Copenhagen. Christian IV was very fond of the palace and often stayed at the castle when he resided in Copenhagen, and it was here that he died in 1648. After his death, the palace passed to his son King Frederik III, who together with his queen, Sophie Amalie, carried out several types of modernisation.
The last king who used the place as a residence was Frederik IV, and around 1720, Rosenborg was abandoned in favor of Frederiksborg Palace.Through the 1700s, considerable art treasures were collected at Rosenborg Castle, among other things items from the estates of deceased royalty and from Christiansborg after the fire there in 1794.
Soon the idea of a museum arose, and that was realised in 1833, which is The Royal Danish Collection’s official year of establishment.