A German divine, born at Isleb. He was the friend and the disciple of Luther, but afterwards violently opposed him, and became the head of the Antinomians, a sect which regarded faith as the whole of the duties of man. He was also engaged in a dispute with Melancthon; but, with the most laudable motives, he endeavored to effect a reconciliation between the Catholics and Protestants. He died at Berlin, 1566, aged seventy-four.