Yves Klein applied to decorate the Gelsenkirchen Opera House, in the Ruhr, in Germany.
June 24-July 13: the exhibition Monochrome Propositions of Yves Klein was held at Gallery One in London. On 26 June, in the course of a debate in which Klein and Restany took part at the Institute of Contemporary Arts, a polemic of unforeseen proportions broke out. The English press echoed the scandal caused by the exhibition.