[Readers of Miguel Sanchez’s Imagen de la Virgen María, which contained the first published account of Our Lady of Guadalupe’s acclaimed apparitions to the indigenous neophyte Juan Diego, rarely recognize that he was trained in the theology of the Church Fathers, particularly in the writings of St. Augustine. Here the author illuminates the influence of patristic thought and theological method on Sanchez, as well as the frequently ignored but foundational role of his theology and that of the Church Fathers on the Guadalupe tradition.]