Photo, 1961 Yves Klein and Rotraut Uecker at the opening of the exhibition “Monochrome und Feuer”, Museum Haus Lange
Photo, 14 janvier 1961 Rotraut Uecker in the room dedicated to the "Immaterial Pictorial Sensibility" during the opening of the exhibition "Yves Klein Monochrome und Feuer" at the Museum Haus Lange