In 1950 Nono first attended the Darmstadt Summer Courses for New Music which saw the world première of his Variazioni canoniche sulla serie dell’op. 41 di Schoenberg. By using the twelve-note series from Schoenberg’s anti-Fascist Ode to Napoleon Op. 41, Nono, a member of the Italian Communist Party since 1952, referred to its political statement. At the Hamburg performance of Schoenberg’s opera Moses und Aron he met Schoenberg’s daughter Nuria whom he married a year later. Dedicated to her is Liebeslied for mixed choir and instruments which was first performed in London in 1956. His work Incontri per 24 strumenti, premiered in Darmstadt in 1955, is characterized by the use of a complex mirror form and a twelve-note series in which the intervals diverge in a zigzag. After this work, large expressive interval leaps became a typical feature of Nono’s melodies. Possibly his best-known work, Il canto sospeso for soprano, alto and tenor solo, mixed choir and orchestra, was premiered in Cologne in 1956. In this work, Nono set farewell letters from Resistance fighter condemned to death. He intended to musicalize the texts by breaking the language up into syllables, thus making its musical content ready for composition.