John Calvin, born Jean Cauvin on July 10, 1509, in Noyon, France, was a prominent theologian and reformer whose work significantly influenced the Protestant Reformation. He passed away on May 27, 1564, in Geneva, Switzerland, where he had established a lasting legacy as a leader of the Reformed tradition. His contributions to theology and church governance have made him a central figure in the development of Protestant thought.

Calvin's early life was marked by a rigorous education. He initially studied at the University of Paris, where he was exposed to humanist ideas and the works of early reformers. Following a brief period in law school, Calvin experienced a spiritual transformation that led him to embrace the Reformed faith. This pivotal moment redirected his life towards theological study and reform.

Calvin's literary career began in earnest with the publication of "Institutes of the Christian Religion" in 1536. This seminal work laid the foundation for Reformed theology, emphasizing the sovereignty of God, the authority of Scripture, and the doctrine of predestination. His writings, which include commentaries on various books of the Bible and treatises on church governance, have had a lasting impact on Christian doctrine and practice.

In his personal life, Calvin was known for his intense dedication to his work and his community. He married Idelette de Bure, a widow, in 1540, and their partnership was marked by mutual support and shared commitment to Calvin's reform efforts. Calvin's life was also characterized by challenges, including opposition from both civil authorities and rival theological factions, yet he remained steadfast in his mission to reform the church.

Overall, John Calvin's legacy is one of profound influence on Christianity, shaping the beliefs and practices of millions through his theological insights and commitment to reform. His enduring impact is felt to this day in various Protestant denominations worldwide.