The 1549 Consensus Tigurinus brought together those who followed Zwingli and Bullinger's memorialist theology of the Lord's supper, which taught that the supper simply serves as a reminder of Christ's death, and Calvin's view that the supper serves as a means of grace with Christ actually present, though spiritually rather than bodily.
The document demonstrates the diversity as well as unity in early Reformed theology.
Calvin's Institutes of the Christian Religion (1536–59) was one of the most influential theologies of the era.
Toward the middle of the 16th century, the Reformed began to commit their beliefs to confessions of faith, which would shape the future definition of the Reformed faith.
In Switzerland, some cantons are still Reformed and some are Catholic.
Calvinism became the theological system of the majority in Scotland (see John Knox), the Netherlands (see William Ames, T. Frelinghuysen and Wilhelmus à Brakel), some communities in Flanders, and parts of Germany (especially these adjacent to the Netherlands) in the Palatinate, Kassel and Lippe with the likes of Olevianus and his colleague Zacharias Ursinus.
Calvinism was adopted in the Electorate of the Palatinate under Frederick III, which led to the formulation of the Heidelberg Catechism in 1563, and in Navarre by Jeanne d'Albret.In the twentieth century, Abraham Kuyper, Herman Bavinck, B. Nevertheless, the term first came out of Lutheran circles.Calvin denounced the designation himself: Despite its negative connotation, this designation became increasingly popular in order to distinguish Calvinists from Lutherans and from newer Protestant branches that emerged later.Scripture was also viewed as a unified whole, which led to a covenantal theology of the sacraments of baptism and the Lord's Supper as visible signs of the covenant of grace.Another Reformed distinctive present in these theologians was their denial of the bodily presence of Christ in the Lord's supper.