Ein feste Burg ist unser Gott
Eccard's works consist exclusively of vocal compositions, such as songs, sacred cantatas and chorales for four or five, and sometimes for seven, eight, or even nine voices. Their polyphonic structure is a marvel of art and still garners the admiration of musicians. At the same time his works are filled with a spirit of true religious feeling. Before the First World War, his setting of Martin Luther's words "Ein feste Burg ist unser Gott" ("A Mighty Fortress Is Our God") was regarded by the Germans as their representative national hymn.