The artist Imi Knoebel – a resident of Düsseldorf – is one of the most important German representatives of postmodernism internationally. During the 1960s, the Russian Suprematist artist Kazimir Malevich, and in particular his celebrated Black Square, strongly influenced Imi Knoebel, and has shaped the development of his minimalist work up to the present. For the Bel Etage of the K21, Knoebel has devised a dialogical interplay between his own works and those of Malevich.