Lee Radziwill was an American socialite, successful PR executive, and interior designer who is remembered as an icon of the twentieth century. She lived in the townhouse with aristocrat Prince Stanislaw who was a scion of the Polish-Lithuanian princely House of Radziwill.  The home, which was decorated by Italian decorator and set designer Renzo Mongiardino is one of the most beautiful in London – and one of the world’s best homes. Here, we take a tour.  While this 5,613-square-foot property now differs from Mongiardino’s eclectic canvas, the home remains a trove of modern decorating ideas. The most contemporary of these are exhibited in the neutral living space that combines minimalist tones with a colorful library wall that brings a sense of vibrancy to the room.  This sleek aesthetic flows into the open-plan dining space that reshapes white kitchen ideas through its invisible appliances and glass French doors that drench the room with natural daylight.  Beyond the wooden-glass staircase, the home has two reception rooms and a private terrace. The next floor is exclusively dedicated to the principal suite – one of seven bedrooms in the home.  Perhaps, the pièce de résistance of the property, however, is the secret decked roof terrace that is accessed through a glass sliding roof panel. The terrace overlooks the preeminent Belgravia neighborhood, while the boutiques and restaurants of Mayfair are only moments away.   ‘This property is not only grand and historic but conveniently located close to the green open spaces of St. James’s and Green Park,’ says Harry Laflin, Manager of letting agents, Dexters Westminster (opens in new tab). ‘On the doorstep of Mayfair, and close to Victoria, it would make a glamorous family home.’ This highly fashionable location is, of course, only fitting for one of the most stylish figures of the sixties. Her home is currently listed with Dexters Westminster for £8,750,000.