He was a founding father of the Viennese Actionists, a group of radical artists who used their bodies and other elements to upend art-making at the dawn of the 1960s.He was a founding father of the Viennese Actionists, a group of radical artists who used their bodies and other elements to upend art-making at the dawn of the 1960s.Read MoreNitsch, Hermann, Deaths (Obituaries), Art, Performance Art, Austria, Viennese Actionists