Document, 1957 Invitation card for the double exhibition "Yves Klein: Propositions monochromes" at the Iris Clert and Colette Allendy Galleries
Photo, january 1957 Yves Klein during the exhibition "Proposte monocrome, epoca blu", Galleria Apollinaire
Photo, 1959 International collaboration between artists and architects in the realisation of the new Gelsenkirchen Opera House
Photo, October 27th 1960 Meeting for the signature of the “Déclaration Constitutive du Nouveau Réalisme” in Yves Klein’s studio
Photo, 1960 Meeting for the signing of the "Déclaration Constitutive du Nouveau Réalisme" in Yves Klein's studio