Photo, 1959 Yves Klein, Iris Clert and Rotraut at the opening of the exhibition "Bas-reliefs in a sponge forest", Galerie Iris Clert
Photo, 1959 Portrait of Yves Klein in front of the Sponge Relief (RE 19) and the Sponge Sculpture (SE 260)
Photo, 1959 Soto during the Opening of the exhibition “Vision in Motion - Motion in Vision", Hessenhuis, Antwerp