Arman, a fellow Nice judo enthusiast met at 18, stayed a close friend for life. Spoerri, Saint Phalle, Arman, and Tinguely were all members of the Nouveaux réalistes, founded in Klein’s Paris flat and promoted by Restany; Christo joined later. Klein had met Tinguely in Germany, Tinguely introducing Spoerri to him. Klein’s wedding reception ended up in Rivers’ studio, Christo setting out to immortalise it (he didn’t finish). Henry provided music for Klein, Manzoni met him at his first Italian show, Parent worked with him on elemental fountains and an air ceiling, and Saint Phalle invited him to shoot at her sculptures.