Publisher Desc.  "A Mighty Fortress" uses both Bach's familiar version, along with Martin Luther's more rhythmic original tune. The piece opens with an ethereal background, chiming of church bells and a subdued brass fanfare, foretelling the dawn of a new era. Luther's text addresses the idea of warfare in the spiritual realms, and "A Mighty Fortress" depicts battle lines drawn, armed forces gathering, and finally the culminating conflict and triumphant fourth statement. The piece ends with a jubilant reprise of the opening brass fanfare.