 At Documenta IV in Kassel in 1968, he positioned a large, plaster slash as the centre of a totally white labyrinth, including ceiling and floor ("Ambiente spaziale bianco").Shortly before his death he was present at the "Destruction Art, Destroy to Create" demonstration at the Finch College Museum of New York.Then he left his home in Milano and went to Comabbio (in the province of Varese, Italy), his family's mother town, where he died in 1968.