Formula of Concord / Book of Concord
The Formula of Concord (1577), completed and published as the Book of Concord (1580), was subscribed by three electors and 86 other princes and municipalities, representing over 8,000 Lutheran theologians, making it the binding confessional covenant of Lutheran dynastic identity across German-speaking territories. The Book of Concord gathers Luther's Small and Large Catechisms, the Augsburg Confession, its Apology, the Schmalkald Articles, Melanchthon's Treatise on the Power of the Pope, and the Formula itself, functioning simultaneously as doctrinal standard and territorial constitutional document for subscribing princes. Its inclusion of Luther's catechisms — already in daily household and catechetical use — gave the collection an immediate pastoral reach far beyond court theology. The Formula's Epitome distills twelve contested doctrinal points — including original sin, free will, justification, and the Lord's Supper — into a form still used for Lutheran confirmation and ordination preparation today.