The fourth century AD historian Ammianus Marcellinus remarked that “no wild beasts are such enemies to mankind as are most of the Christians in their deadly hatred of one another.” More to the point, the discussion of the nature of Christ drove a wedge within Christian communities in Antioch as elsewhere and ignited conflicts on a unprecedented scale. This chapter describes how the playing out of these debates had repercussions at all the levels of Antiochene society.

This chapter reframes the early Arian controversy in the context of the legacy of the Great Persecution and contemporary conflicts on visuality, divinity, and image. Arius’ controversial apophatic theology and his definition of the changeability of the Son reflect traditional anti-idolatry themes. These may be linked to values of lived religion in Alexandria, especially as illustrated by martyrs and ascetics in the uncertain new reign of imperial tolerance under Licinius. Placing Arius’ description of the Son into the context of Porphyry’s discussions on religious images, as cited by both Athanasius and Eusebius, suggests that he was defending broader cultural values and practices of monotheism against alleged materialism in Alexander’s definition of eternal generation and image.

A key figure in the Arian dispute leading up to and following the Council of Nicaea, Eusebius of Caesarea (bishop c. 313-39) was not only implicated as a central player in the broader theological developments of the early fourth century but was also one of the most significant formulators of ancient literary representations of the council itself. His writings contain an eye-witness account of the council; a broader narrative of Constantine’s interactions with Christian bishops; letters of Constantine addressing issues of theological or practical debate; his own letters to his home congregation at Caesarea and to other bishops involved in the controversy; and his theological polemic against Marcellus of Ancyra, the promoter of a more radical anti-Arian position. These texts simultaneously assist and complicate modern attempts to construct the precise nature and dynamics of the controversy, the council, and its aftermath. They also provide a fascinating angle by which to discern important features of Eusebius’s fertile authorial work: he stands as a careful and creative formulator of a powerful historiographic, theological, and political vision that would make a signal impact upon later competing accounts of the Council of Nicaea.

The introduction to this volume begins with a reflection on the impact of Dan Brown’s novel, The Da Vinci Code, especially for its presentation of the Council of Nicaea as a conspiratorial moment in the history of Christianity. It then offers a sweeping examination of how various contemporary Christian traditions and denominations have received the Council of Nicaea and its creed and how they understand historical figures such as Arius and Constantine. As we near the 1,700-year anniversary of the first “ecumenical” council, the chapters in this volume will revisit old debates and discussions, ask new questions, and offer different perspectives on the people, context, and consequences related to the Council of Nicaea.

The bitter division in Alexandria that led to the Council of Nicaea began as a theological dispute between Alexander, the bishop of Alexandria, and a significant number of his clergy, including a presbyter Arius, and quickly overflowed into a feud among eastern bishops. “Arianism” was assumed by scholars and theologians to be a coherent set of heretical teachings embraced by a succession of followers. Historians have now identified sets of alliances rather than genealogies as well as the polemical construction of “Arianism” by Athanasius and Marcellus. This separation of Arius from later “Arianism,” together with the continuing lack of consensus with regard to theological or philosophical genealogies as the source of his thought, encourages another look at the particular social and religious context of the initial local controversy. The central issues of monotheism, apophatic theology, incarnation, and changeability in fact map over traditional Christian apologetic theology and the literary and ecclesiastical legacies of the Great Persecution. Arius’s insistence on divine monotheism and transcendence together with his defense of a “living image” may echo the contemporary arguments with Celsus and Porphyry in Eusebius and Athanasius as well as a refutation of polytheism.

The main acts of Nicaea were gradually reversed over the years 327-60. Constantine honored its name and canons throughout his life, but recalled Arius from exile, leaned on church leaders to restore him to communion, and sidelined Arius’s opponents. Constantius II flouted Nicaea’s canons and officially replaced its creed. Nonetheless, Nicaea’s pronouncements on the Son’s relationship to the ousia of the Father, including the term homoousios, which had been a response to Eusebius of Nicomedia’s Letter to Paulinus of Tyre, continued to be debated throughout this period in a succession of mutually allusive theological works. These include Eusebius of Caesarea’s Letter to his Church, Eustathius of Antioch’s Against the Arian Madness, Asterius the Sophist’s Defence of Eusebius of Nicomedia, Marcellus of Ancyra’s Against Asterius, Eusebius’s Against Marcellus and On Ecclesiastical Theology, Acacius of Caesarea’s Against Marcellus, Marcellus’ Letter to Julius of Rome, Athanasius’s Orations Against the Arians, the Profession of Faith of Sirmium 351, and Athanasius’s On the Decrees of Nicaea. The last of these, together with his formidable political skills, established the Nicene Creed against all the odds as the only formula which was able to command widespread support among bishops across the empire after the death of Constantius.