Abstract
The present inquiry engages with the perception of Islam and of Christian-Muslim relations in the works of the sixteenth-century Zurich Reformer Heinrich Bullinger (1504–1575). On the basis of previous research, it attempts to deepen our understanding of the Reformer’s theory of Islam by comparing it with the notions of true and false prophecy. This theological perspective is broadened by a discussion of Bullinger’s more practical advice on the Christian presence in Turkish territories and on evangelization of Muslims. These themes are explored through the Reformer’s correspondence, his 1551 catechetical letter to Hungarian Protestants, and his 1567 systematic and polemical exposition of Islam (Der Türgg).