Comedian by the Italian artist Maurizio Cattelan, has been described as the most famous and controversial artwork of the 21st century. It's set to make history when it goes to auction this week at Sotheby's in New York, with a pre-sale estimate of up to USD1.5 million. On the eve of it's sale, Charles Ninow spoke to Emile Donovan about how we define and value art.
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Listen to the interview here.

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