Louis Andriessen (1939) is widely regarded as a central figure in the international new music scene. Performers of his work include the two Dutch groups named after his works De Volharding and Hoketus, the Asko/Schoenberg Ensemble, London Sinfonietta, Ensemble Modern and Bang On A Can All Stars. Amongst his many works for music theater are collaborations with Peter Greenaway (Rosa, Writing to Vermeer) and Hal Hartley.