John Calvin (July 10, 1509-May 27, 1564)

French theologian and pastor, former lawyer, who after his conversion followed Luther in the Augustinian tradition, emphasizing predestination and grace alone for salvation.

Wrote the Institutes in Christian Religion (one of the first systematic theologies) and also a Commentary on the Bible (everything but 2 and 3 John and Revelation).

Worked to unite the Reformers. Attacked the Mass and sided with Zwingli on Communion, however later he stopped debating it so as to promote unity with Lutherans.

Learn more about Calvin here.