Helmut Lachenmann
Composers such as, initially, Karlheinz Stockhausen, Pierre Boulez, Luigi Nono, Bruno Maderna, and later Luciano Berio, Aldo Clementi, Franco Donatoni, Niccolò Castiglioni, Franco Evangelisti, Karel Goeyvaerts, Mauricio Kagel, Gottfried Michael Koenig, Giacomo Manzoni, Henri Pousseur, Helmut Lachenmann, and Brian Ferneyhough presented their radical approach and theories. They are sometimes referred to as the "Darmstädter Schule" (Darmstadt School).