John Calvin (born Jean Cauvin), was one of the most prominent and powerful leaders of the Protestant Reformation, which was initiated by Martin Luther. Expressing through a temperament utterly in contrast to the bold, rough and colorful, Luther, Calvin, a reticent, logical, controlled and controlling man, systematized the fundamental principles of the Reformation in his massive and authoritative Institutes of the Christian Religion, considered to be one of the most influential theological works of all time.
→