Collection of source material documenting the Lutheran Reformation in Germany during the period 1500–1600. The collection consists of 362 titles and is made up of works by prominent figures of the Lutheran Reformation, such as Johanness Bugenhagen, Jakob Andreae, Matthias Flacius Illyricus, Martin Chemnitz, Tilemann Heshusius, Aegidus Hunnius, Johann Wigand, and many others.