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The extra Calvinisticum from the Marburg Colloquy to the Consensus Tigurinus

This chapter investigates the historical and theological development of the extra Calvinisticum from the Marburg Colloquy (1529) to the Consensus Tigurinus (1549). During this period, the proponents of the emerging Reformed tradition expanded the theological basis for the extra by incorporating additional arguments from Scripture, the church councils, and the church fathers. First, the chapter investigates the debate at the Marburg Colloquy demonstrating that the christological divergence between Zwingli and Luther was rooted not only in theological and hermeneutical method but also in the doctrines of God and anthropology. The chapter analyzes Zwingli’s final works, Fidei Ratio and Fidei Expositio, in which he presents a more robust understanding of the hypostatic union. The final section addresses the Consensus Tigurinus, written by Heinrich Bullinger and John Calvin, which offers the confessionalization of the extra in the Reformed tradition and effectively marks the definitive parting of ways within Protestantism over the Lord’s Supper.