Fifty years on, the interview remains a compelling watch. Duchamp’s significance was not what it is today but his reputation had risen again, after years in which it was thought he had given up art for chess. Artists like Jasper Johns, Robert Rauschenberg and John Cage had befriended him and seen him as a mentor. They prompted a revival of interest in the 1950s that was bolstered in the 1960s by Pop artists in Britain and the US and the first stirrings of conceptualism. It was only then that Duchamp had his first retrospective, at the Pasadena Art Museum in California in 1963. That was followed by one at the Tate Gallery in London in 1966.