Anthropometries of the Blue Period and Fire Paintings (1960)

In the performance piece Zone de Sensibilité Picturale Immatérielle Zones of Immaterial Pictorial Sensibility 195962 he offered empty spaces in the city in exchange for gold He wanted his buyers to experience The Void by selling them empty space In his view this experience could only be paid for in the purest material gold In exchange he gave a certificate of ownership to the buyer As the second part of the piece performed on the Seine with an Art critic in attendance if the buyer agreed to set fire to the certificate Klein would throw half the gold into the river in order to restore the natural order that he had unbalanced by selling the empty space that was now not empty anymore He used the other half of the gold to create a series of goldleafed works which along with a series of pink monochromes began to augment his blue monochromes toward the end of his life