Concordia Formula, the seventh and last symbolical book of the Lutheran church, in which the doctrinal development of that church in respect to the Lord's supper and the person of Christ was completed. The elector Augustus of Saxony, a partisan of Lutheran orthodoxy, made the sixth attempt to reconcile the stricter Lutherans, the milder Philippists, and the crypto-Calvinists to a common confession, when in 1576 he summoned the Lutheran theologians to meet for counsel in a convent at Torgau. The result of their deliberations, known as the "Torgau book," was submitted to the various German Lutheran churches, most of which, however, returned replies and criticisms instead of an unconditional assent. The elector therefore convened on March 11, 1577, in the cloister of Bergen, near Magdeburg, the three eminent theologians, Andreaae, Chemnitz, and Selnecker, to revise the Torgau book. In their first session they prepared the Epitome and the Solida Declaration which were elaborated anew in April, and received their final form in a third session in May, to which Musculus, Cornerus, and Chytraus were also admitted.

These two statements of faith, of which the latter is the fuller, constitute the "Form of Concord." It was at once accepted by 3 electors (2 of whom soon seceded), 20 dukes and margraves, 24 counts, and 35 free cities, and was rejected by Hesse, Nassau, Pomerania, Holstein, Anhalt, and many important free cities. It was originally drawn up in German, and was translated into Latin successively by Osiander, Selnecker, and the convention of Quedlinburg in 1583; the last of which only was approved by the elector, and received as authentic. A complete history of the "Form of Concord" was written by J. N. Anton (Leipsic, 1779).