Poster for First World Congress: Happenings, St. Mary's of the Harbor, New York, August 30 & September 1, 1965

Al Hansen was an American artist and performer central to the Fluxus movement of the 1960s. Working across performance, installation, and mixed media, he created event scores and participatory works that prioritized chance, absurdity, and audience involvement over conventional art objects. His practice encompassed mail art, sound works, and ephemeral interventions that challenged the boundaries between art and everyday experience. Hansen's output resisted institutional documentation, reflecting his commitment to art as a contingent, anti-commercial gesture rooted in the postwar avant-garde.