Photo, 1961 Yves Klein and Paul Wember at the opening of the exhibition "Yves Klein Monochrome und Feuer" at the Museum Haus Lange
Photo, 1957 Yves Klein at the opening of his exhibition "Yves Propositions monochromes", Galerie Schmela, Düsseldorf
Document, 1957 Invitation card for the double exhibition "Yves Klein: Propositions monochromes" at the Iris Clert and Colette Allendy Galleries