Confessional Lutheranism is a name used by Lutherans to designate those who believe in the doctrines taught in the Book of Concord of 1580 in their entirety. Confessional Lutherans maintain that faithfulness to the Book of Concord, which is a summary of the teachings found in Scripture, requires attention to how that faith is actually being preached, taught, and put into practice. Confessional Lutherans believe that this is a vital part of their identity as Lutherans.
...one holy Church is to continue forever. The Church is the congregation of saints, in which the Gospel is rightly taught and the Sacraments are rightly administered.—Augsburg Confession
Franz Pieper (1852–1931) taught the importance of a quia subscription
Lutheranism is a major branch of Protestantism, identifying primarily with the theology of Martin Luther, the 16th-century German monk and reformer whose efforts to reform the theology and practices of the Catholic Church launched the Protestant Reformation.
Martin Luther, a 1529 portrait of Martin Luther by Lucas Cranach the Elder
The title page of the Swedish Gustav Vasa Bible, translated by brothers Olaus Petri and Laurentius Petri and Laurentius Andreae
A Hundskirche replica
The University of Jena in Germany, the center of Gnesio-Lutheran activity leading up to the Formula of Concord, and a center of Lutheran orthodoxy