Clavierübung III contains a brilliant cycle of 27 of J. S. Bach’s masterworks united by musical and theological design. They were selected by Bach and published in 1739, the bicentennial of Leipzig’s acceptance of Martin Luther’s Augsburg Confessions. James Kibbie performs on the 1990 Létourneau organs (3-55 and 1-4) in the Cathedral of St. Catherine of Alexandria in St. Catherines, Ontario.