The Dutch musicologist, conductor, organ and clavecimbel player Ton Koopman specilizes in the performance of Early Music, in particular the music of Johann Sebastian Bach. Although Koopman performs across the globe with his Amsterdam Baroque Orchestra, Koopman is also a sought-after organist. In this broadcast in St. Mary's Cathdral in Leipzig, the treasured musician performs organ compositions by Johann Sebastian Bach: 'Wachtet Auf', BWV 645; 'Nun komm der Heiden Heiland', 'Fugue in g minor', 'Schmücke dich, o liebe Seele', and the 'Toccata in d minor'.