Martin Chemnitz (9 November 1522 – 8 April 1586) was an eminent second-generation German, Evangelical Lutheran, Christian theologian, and a Protestant reformer, churchman, and confessor.

He remained in school until his finances were exhausted; he then took a teaching job in the town of Wriezen, supplementing his income by collecting the local sales tax on fish.

His time at Frankfurt gave him the basic tools to continue his education on his own, researching areas in which he was interested and applying his naturally inquisitive mind to problems that others had worried over in the past.

However, a plague soon infested the Baltic Sea Hanseatic German port town of Königsberg in East Prussia, (today renamed Kaliningrad since occupied by the Soviet Union in 1945 at the end of World War II, now annexed into the Russian Federation) so Chemnitz left quickly for Saalfeld.

When he judged it safe, Chemnitz returned to Königsberg in 1550, now employed by Albert, Duke of Prussia, as the court librarian for the Konigsberg State and University Library.

He began his own course of study by carefully working through the Bible in the original languages of Hebrew and Ancient Greek with the goal of answering questions that had previously puzzled him.

Other major works are Examen Concilii Tridentini[1] (Examination of the Council of Trent) and De Duabis Naturis in Christo (On the Two Natures in Christ).

These works demonstrate Martin Chemnitz's abilities as a biblical, doctrinal and historical theologian in the orthodox Lutheran tradition.