Four-part documentary series in which Simon Russell Beale explores the flowering of Western sacred music. With music performed by The Sixteen, conducted by Harry Christophers, Beale explores how Martin Luther, himself a composer, had a profound effect on the development of sacred music, re-defining the role of congregational singing and the use of the organ in services. Ultimately, these reforms would shape the world of JS Bach and inspire him to write some of the greatest sacred music.