Martin Luther's best-known hymn is "Ein' feste Burg," or "A mighty fortress." He wrote this "battle hymn of the Reformation" in 1529. Luther composed both the melody and the original words. One commentator says, "The hymn was used throughout Germany during the long struggle for religious liberty." Concordance to Christian Science Hymnal and Hymnal Notes, (Boston: The Christian Science Publishing Society, 1975), p. 179–180.
There are over 70 translations of the hymn into English. The version below is from the Christian Science Hymnal, and is a paraphrase of the original.
Frederic W. Root
Based on hymn by Martin Luther