Document, 1955

Letter from Yves Klein to the Committee of the Salon des Réalités Nouvelles

Document, 1956

Invitation card for the exhibition "Yves Monochrome Proposals" at Colette Allendy gallery

Document, 1957

Invitation for the exhibition : Monochrome Propositions of Yves Klein à Gallery One

Document, 1957

Exhibition invitation card "Yves Monochrome Proposals" at Schmela Gallery

Document, 1958

Invitation card of the exhibition “The Void”, at Gallery Iris Clert, Paris

Document, 1958

Postcard to Iris Clert

Document, 1959

Invitation card: "L'évolution de l'art vers l'immatériel" (Sorbonne)

Document, 1964

Invitation card for the exhibition "Yves Klein Peintures de feu" at the Galerie Schmela, Düsseldorf