Willem de Ridder (14 october 1939 – 29 december 2022) was a Dutch international known Fluxus-artist. He was an agent for FLUXUS Europe North and the founder of the European Mail-Order House in 1964. He was the publisher of taboo breaking magazines, the producer of Radio Art programmes and he enjoyed international fame as a master storyteller. In 2017 CultClub Amsterdam published: The Adventures of Willem de Ridder.
