Norbert Kricke and Yves Klein during the opening of the exhibition "Yves Propositions Monochromes", Schmela Gallery, Düsseldorf, 1957

Opening of the exhibition "Yves Propositions Monochromes", Galerie Schmela, Düsseldorf, 1957

Opening of the exhibition "Yves Propositions Monochromes », Schmela Gallery, Düsseldorf, 1957

Yves Klein during the opening of the exhibition "Yves Propositions Monochromes », Schmela Gallery, Düsseldorf, 1957

Opening of the exhibition "Yves Propositions Monochromes », Schmela Gallery, Düsseldorf, 1957

Pierre Restany during the opening of the exhibition "Yves Propositions Monochromes », Schmela Gallery, Düsseldorf, 1957

Yves Klein, Iris Clert and Alfred Schmela during the opening of the exhibition "Yves Propositions Monochromes », Schmela Gallery, Düsseldorf, 1957

Opening of the exhibition "Yves Propositions Monochromes », Schmela Gallery, Düsseldorf, 1957

Opening of the exhibition "Yves Propositions Monochromes », Schmela Gallery, Düsseldorf, 1957

Norbert Kricke, Alfred Schmela et Yves Klein during the opening of the exhibition "Yves Propositions Monochromes », Schmela Gallery, Düsseldorf, 1957

Vernissage de l'exposition "Yves Propositions Monochromes », Galerie Schmela, Düsseldorf, 1957