The NDR Chor is the choir of the German broadcaster Norddeutscher Rundfunk, based in Hamburg. It was founded in 1946, with Max Thurn as the first director of then 55 singers. The group has participated in premieres of contemporary music, such as the posthumous concert premiere of Schoenberg's opera Moses und Aron. It is also known for a capella music, introduced by Helmut Franz such as a recording of all such works by Johannes Brahms. The current artistic director is Philipp Ahmann, who has held the position from 2008. NDR Chor, now a group of 28 singers, is one of the leading professional chamber choirs in Germany.