 As a consequence of his first visit to New York in 1961, he created a series of metal works, done between 1961 and 1965.The works consisted of large sheets of shiny and scratched copper, pierced and gouged, cut through by dramatic vertical gestures that recall the force of New York construction and the metal and glass of the buildings.Among Fontana's last works are a series of "Teatrini" (‘little theatres’), in which he returned to an essentially flat idiom by using backcloths enclosed within wings resembling a frame; the reference to theatre emphasizes the act of looking, while in the foreground a series of irregular spheres or oscillating, wavy silhouettes creates a lively shadow play.