The Persecutions.

After these humble beginnings, Christianity spread far and wide throughout the known world, but the Good News of Christ aroused intense opposition, and the first three centuries of the Church were characterized by sporadic, but bloody, persecutions. Church tradition is full of the lives of these early martyrs for the faith, and one cannot but admire the courage and perseverance of these heroes who willingly gave up their lives rather than denounce Christ. Among these were Ignatius, Bishop of Antioch, Polycarp, Bishop of Smyrna, burned at the stake when over eighty years old, Justin the Martyr, and Cyprian, Bishop of Carthage, as well as many other men and women martyrs, who are commemorated in the Church Calendar.

These persecutions were often local in character and of limited duration, and although there were long periods of de-facto toleration, the threat of persecution was always there. Christians knew that at any time the threat of persecution could become a very present reality and the idea of martyrdom held a central place in the spiritual outlook of these warriors for Christ. Later, when persecution and martyrdom ceased to be a major concern of the Christians, the idea, nonetheless, did not disappear, but took other forms. Chief among these was the monastic life, regarded by many as a form of martyrdom equal to bodily death.

In 312, however, a momentous event occurred, for in that year, seeing, in a vision, a Cross in the sky with the inscription, In this sign conquer, and placing the Cross on the shields of his army, the Emperor Constantine defeated a rival army and ultimately became the first Roman Emperor to embrace Christianity. In 313, Constantine and his fellow Emperor Licinius issued the Edict of Milan, which proclaimed the official toleration of the Christian faith. Fifty years later, the Emperor Theodosius carried this policy even further when he legislated Christianity as the only accepted religion of the Empire, while outlawing paganism.

In 324, Constantine moved his imperial capital from Rome to Byzantium, on the shores of the Bosporus, where he built a new capital, Constantinople (dedicated in 330). From here, in 325, he summoned to Nicea what was to be the first of the Seven Ecumenical Councils.