Below is the full article. For the article summary, see John Calvin summary. John Calvin, French Jean Calvin or Jean Cauvin, (born July 10, 1509, Noyon, Picardy, France—died May 27, 1564, Geneva, Switzerland), theologian and ecclesiastical statesman. He was the leading French Protestant reformer and the most important figure in the second generation of the Protestant Reformation. His interpretation of Christianity, advanced above all in his Institutio Christianae religionis (1536 but elaborated in later editions; Institutes of the Christian Religion), and the institutional and social patterns he worked out for Geneva deeply influenced Protestantism elsewhere in Europe and in North America. The Calvinist form of Protestantism is widely thought to have had a major impact on the formation of the modern world.