Perched on a rocky outcrop, this islet had been inhabited since the 2nd century AD. The fortified castle, built in the Merovingian period, and the estate was to have countless occupants before coming under state ownership during the French Revolution.
The fort was built in the 13th century and was used for military purposes for most of its life, belonging to a variety of noble families as they fell in and out of power throughout the centuries. The fort was besieged several times and used as a place to escape; Queen Jeanne Ire stayed in 1348 after fleeing Naples, which had been invaded by her cousin – she used it as a pit-stop on her way to taking refuge in Marseille. The fort wasn’t badly affected by the French Revolution, although a few items were plundered by locals.
Napoleon took a liking to the fort and stayed here during the winter of 1793-94. When he became Emperor, he supplied funds to build up the garrison. After the Franco-Prussian war of 1870, the War Ministry allocated money to build an artillery, although they didn’t do much to the outside of the main structure, which was slowly falling into disrepair. It was occupied by a small garrison during World War I until it was finally decommissioned in 1919.
In 1968, General de Gaulle transformed it into one of the official residences of the President of the Republic. The monument houses numerous gifts received by heads of state during France's Fifth Republic.
The Fort de Brégançon served as the official retreat of the President of France until 2013.
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.