Document, 1957 Invitation card for the double exhibition "Yves Klein: Propositions monochromes" at the Iris Clert and Colette Allendy Galleries
Exhibition, 10 May 1957 - 25 May 1957 Yves Klein : Propositions monochromes Galerie Iris Clert, Paris, France
Photo, janvier 1961 Yves Klein next to a Sponge Relief (RE 10) lors de son exposition "Yves Klein Monochrome und Feuer", Museum Haus Lange