In the triumph of Christianity after Constantine's victory at the Milvian Bridge, no group has been more assiduously studied than the senatorial aristocracy of the fourth and fifth centuries, the clarissimi and their families, whose initial reluctance to abandon paganism is as clear as their ultimate accommodation to the new religion. An important indication of their Christianization is the number of them who were willing to forego traditional political careers for ecclesiastical office. Ambrose comes immediately to mind as an example of such a senator from the fourth century, and Sidonius Apollinaris from the fifth. With precipitous speed Ambrose resigned the governorship of Aemilia-Liguria to become bishop of Milan, and Sidonius accepted ordination to the see of Clermont in the year after he had been urban prefect at Rome. Because of these senators and some others like them, students of Late Antiquity have been willing to identify many fourth-century bishops as members of the senatorial aristocracy who seemingly chose between two competing forms of vita activa, the Empire and the Church. The issue is not trivial, especially if one believes with Arnaldo Momigliano that “when the choice is offered, when you can choose between being a bishop and being a consul, you are no longer an ancient man, you are a medieval one.” I think that there were few if any such medieval men among the clarissimi of the fourth century. I propose to argue here that when the identification of fourth-century bishops with imperial senators is cross-examined, it seldom carries conviction, and that the episcopal lists of the fourth century contain surprisingly few names from senatorial families.