Peter Martyr Vermigli stands as one of the most influential yet underappreciated figures of the Protestant Reformation. This inaugural volume of The Peter Martyr Library presents his earliest and most foundational works, offering readers unprecedented access to the theological mind that shaped Reformed thought across Europe. Written during Vermigli's pivotal transition from Italian monastery to Protestant exile, these three works reveal a mature theologian grappling with essential questions of Christian faith, biblical authority, and ecclesiastical reform. His exposition of the Apostles' Creed demonstrates the pastoral heart of a scholar who declared that "Christianity is a profession of wisdom, heavenly and divine." The Strasbourg theses showcase his innovative pedagogical method, while his treatise on schism provides a reasoned defense of the Protestant separation from Rome. This volume captures the intellectual ferment of the 16th century, when Renaissance humanism met Reformation theology. Vermigli's synthesis of Aristotelian philosophy, patristic learning, and biblical exegesis offers timeless insights for contemporary Christians seeking to understand the foundations of Protestant orthodoxy. Praise for This Work "Peter Martyr Vermigli was everywhere in the sixteenth century—abbot of a monastery in Naples, teacher and colleague of Cranmer in Oxford, pastor and theologian in Zurich. His erudition was immense, from Aristotle and Augustine and Aquinas to Bucer and Zwingli, not to mention his biblical commentaries. These nine volumes will be a major resource for all who seek to learn from the leading figures of the sixteenth century and, in our own context, to foster ecumenical conversations rooted in the love and truth of Christ.” – Matthew Levering, James N. Jr. and Mary D. Perry Chair of Theology, Mundelein Seminary “Legend has it that Peter Martyr Vermigli wandered out of the Italian Alps as the ‘ready-made reformer,’ a fact confirmed by the respect he commanded among sixteenth-century Reformed churches. A theologian of the first order, trained in catholic theology and fully committed to the Reformation, students of Scripture would do well to read, mark, and meditate upon the biblically faithful, theologically insightful, and practically oriented work of this great theologian.” — J. V. Fesko, Harriet Barbour Professor of Systematic and Historical Theology, Reformed Theological Seminary, Jackson, Mississippi