Document, 1955 Letter from Yves Klein to Jacques Tournier, author of the weekly "Les Nouvelles littéraires, artistiques et scientifiques".
Document, 1955 Invitation card for the exhibition "Yves peintures" at Club des Solitaires at Editions Lacoste, Paris
Document, 1956 Invitation card for the exhibition "Yves Monochrome Proposals" at Colette Allendy gallery
Document, 1964 Invitation card for the exhibition "Yves Klein Peintures de feu" at the Galerie Schmela, Düsseldorf