Willem de Ridder

Willem de Ridder was a Dutch anarchist and artist, known as a founder of Fluxus. He was the foremost Fluxus member in the Netherlands. He showed and sold Fluxus works in his gallery, Amstel 47, and shops Fluxshop and European Mail-Order Warehouse. He organized Dutch Fluxus festivals with Wim T. Schippers in 1963 and 1964.