Austrian performance artist, draughtsman, painter and film maker. Persuaded by Otto Muehl to create, with his wife Anni, his first Aktion or performance, Ana, in November 1964, which he recorded on film in the first of a series of collaborations with the film maker Kurt Kren (b 1920). This led to his first self-painting Aktion, Self-painting 1: Painting by Hand, Painting by Head, Painting the Head, performed the following month. With Muehl, Hermann Nitsch and Rudolf Schwarzkogler he was a founder-member of the Aktionismus group, and with Muehl he helped found the Institut für Direkte Kunst in 1966.