Exhibition, 31 May 1957 - 23 Jun 1957 Yves Propositions monochromes Galerie Schmela, Düsseldorf, Germany
Exhibition, 14 Jan 1961 - 26 Feb 1961 Yves Klein Monochrome und Feuer Museum Haus Lange, Krefeld, Germany
Exhibition, 24 Nov 2018 - 20 Jan 2019 Alfred Schmela: A Centenary Exhibition Kunstsammlung Nordrhein-Westfalen, Düsseldorf, Germany
Photo, 1949 Christmas evening at Hans Hartung's with Yves Klein standing on the right, surrounded by Colette and Pierre Soulages