Document, 1960 Invitation card for the performance "Anthropométries de l'Epoque Bleue", Galerie Internationale d'art contemporain
Document, 1961 Invitation card for the exhibition "Yves Klein Monochrome und Feuer" at the Museum Haus Lange in Krefeld
Document, 1958 Letter from Yves Klein to the President of the International Confederation of Atomic Explosions