"Zero (usually styled as ZERO) was an artist group founded in the late 1950s in Düsseldorf by Heinz Mack and Otto Piene. Piene described it as "a zone of silence and of pure possibilities for a new beginning". In 1961 Günther Uecker joined the initial founders. ZERO became an international movement, with artists from Germany, the Netherlands, Belgium, France, Switzerland, and Italy." - (en.wikipedia.org 11.08.2021)
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