A Mighty Fortress Is Our God M. Luther Arr. N. Munger Published by: Munger Mountain Music © 2025 Pedal Harp Late Intermediate/ Advanced A Mighty Fortress Is Our God originally written in German, is one of the best known hymns by Martin Luther. Luther wrote the words and composed the hymn between 1527-1579. Munger’s arrangement of the classic piece begins delicate and thoughtful, but ends triumphantly and bold.