From the January 5-31, 1969 exhibition, organized by Seth Siegelaub: The four participating artists Robert Barry, Douglas Huebler, Joseph Kosuth and Lawrence Weiner, copyright Seth Siegelaub 1969

Seth Siegelaub was born in the Bronx, New York in 1941 and grew up in New York City. He has been active as a plumber; art dealer, publisher and independent exhibition organizer, including 35 art-related projects and the "Artist's Rights Agreement" from 1964 - 1971; a researcher and publisher of left books on communication and culture; a bibliographer of the history of textiles; and currently a researcher studying the theory of time and causality. He has lived in Europe since the early 1970s, currently in Amsterdam.