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:The Walls of Constantinople are a series of defensive stone walls that have surrounded and protected the city of Constantinople (today Istanbul) since its founding as the new capital of the Roman Empire by Constantine the Great. With numerous additions and modifications during their history, they were the last great fortification system of antiquity, and one of the most complex and elaborate systems ever built. They were also the largest and strongest fortification in both the ancient and medieval world.
Initially built by Constantine the Great, the walls surrounded the new city on all sides, protecting it against attack from both sea and land. As the city grew, the famous double line of the Theodosian Walls was built in the 5th century. Although the other sections of the walls were less elaborate, they were, when well-manned, almost impregnable for any medieval besieger.