Excerpt from Ecclesiastical Ordinances Edited by Hans J. Hillerbrand Published in 1968

John Calvin (1509–1564) was perhaps the most influential leader of the Protestant Reformation, a movement to reform the Roman Catholic Church in Europe. He was involved in reform efforts at the same time as Martin Luther (see entry), the German theology professor who initiated the Reformation. Calvin interpreted Christianity more strictly than Luther, however, establishing his own distinct form of Protestantism in Geneva, Switzerland. Under his tireless direction, Geneva became the focus of successful and far-reaching evangelism (personal commitment to the teachings of Jesus Christ, founder of Christianity), which was the foundation of many present-day Protestant churches.