A magnificent Belle Epoque villa has come up for sale in the South of France, sporting a €30 million (c.£26.65m) asking price and some serious A-List credentials.
Described by agents as a 'once-in-a-lifetime opportunity', the only private estate on the Île Sainte-Marguerite - where the infamous 'Man in the Iron Mask' was held during the 17th century - has been…