Photo, 1957 View of Yves Klein's "Aerostatic Sculpture" during his exhibition "Yves Klein: Propositions Monochromes", Galerie Iris Clert
Photo, 1957 Yves Klein in front of his Sponge Sculpture at the exhibition "Monochrome Propositions of Yves Klein" Gallery One, London
Exhibition, 14 May 1957 - 23 May 1957 Yves Klein : Propositions monochromes Galerie Colette Allendy, Paris, France