Yves Klein (28 April 1928 – 6 June 1962) was a French artist considered an important figure in post-war European art. He is the leading member of the French artistic movement of Nouveau réalisme founded in 1960 by art critic Pierre Restany. Klein was a pioneer in the development of performance art, and is seen as an inspiration to, and as a forerunner of, Minimal art, as well as Pop art. He is often remembered for developing a specific shade of blue: International Klein Blue, which features in many of his paintings. Zone de Sensibilité Picturale Immatérielle involved the sale of documentation of ownership of empty space (the Immaterial Zone), taking the form of a cheque, in exchange for gold; if the buyer wished, the piece could then be completed in an elaborate ritual in which the buyer would burn the cheque, and Klein would throw half of the gold into the Seine. The ritual would be performed in the presence of an art critic or distinguished dealer, an art museum director and at least two witnesses.
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