Art was power for Britain's kings and queens. In a new BBC TV series, Andrew Graham-Dixon visits the paintings amassed by King Charles I, the first great royal collector in British history. He tells Andrew Marr why after Charles was executed his royal artworks were flogged across Europe. The lost royal collection will finally be reunited this year in an exhibition at the Royal Academy of Arts. Historian Leanda de Lisle brings the Stuart monarch back to life in her biography White King. But was the art-loving king a traitor, a murderer or a martyr? And it is not only kings who use art to impress. Don Thompson meets hedge fund managers and foreign oligarchs in his study of the contemporary art scene, while artist Kelly Chorpening describes the role of Camberwell College of Art in shaping the art scene.

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