This is the first English translation of Marius Victorinus' commentary on Galatians. Analytical notes, full bibliography, and a lengthy introduction make this book a valuable resource for the study of the first Latin commentator on Paul. No such comparable work exists in English; and this volume engages fully with German, French, and Italian scholarship on Victorinus' commentaries. A number of themes receive special treatment in a lengthy introduction: the relation of Victorinus' exegetical efforts to the trinitarian debates; the iconography of the apostle Paul in mid-fourth-century Rome; Victorinus' exegetical methodology; his intentions as a commentator; and the question of his influence on later Latin commentators (Ambrosiaster and Augustine).