Raymond Edward "Ray" Johnson, known primarily as a collagist and correspondence artist, was a seminal figure in the history of Neo-Dada and early Pop art. Once called "New York's most famous unknown artist", Johnson also staged and participated in early performance art events as the founder of a far-ranging mail art network – the New York Correspondence School – which picked up momentum in the 1960s and is still active today. He is occasionally associated with members of the Fluxus...
(wikipedia)