Ambrose, the first patrician bishop and a prolific writer of a broad range of works, presents numerous opportunities for interdisciplinary research. His participation in many social groups, sometimes at odds with each other, and sometimes overlapping, demanded flexibility. The result is a protean figure, whose motives are not always clear. His own works and those of the scholars who contribute to this volume are accordingly multidisciplinary. Fields such as theology (especially historical theology), history, classics, philosophy, linguistics, and aesthetics, among others, and the recent international research that belongs to them nuance the volume’s investigation of Ambrose’s actions and motivations. The reader will find that Ambrose’s efforts to create and to strengthen social cohesion included building relationships and erecting social structures set on the foundations of Nicaean Christianity against heresy and paganism. A fusion of Graeco-Roman and Judeo-Christian intellectual traditions reinforced the solidarity Ambrose promoted. These endeavors met with success then, and continue to do so now, as indicated by the modern community of scholars found within this book.