Constantine I , Constantine the Great (272-337) “The First Christian Emperor” by virtue of a deathbed baptism. His Edict of Milan (313) provided supposed religious tolerance to everything Christian. However, the edict came through his desire to mold Christianity to be consistent with his plans for a growing Empire. "As long as the state had been indifferent or hostile, it had classed all Christians, heretical, schismatic, orthodox, together, as equally criminal before the law. Now (313) that it had chosen to become an interested factor, it at once found itself obliged to ”discriminate". It could not conceivably support two sects or two bishops at the same time in the same place." With the conversion of the princes, the tendency to meddle in the internal affairs of the church became more pronounced. Who was more interested than the emperor in knowing which party represented the "true" Christian tradition? The temptation was great to refer the dispute to the emperor. And Constantine wanted to mold a state religion.
The most fundamental beliefs of Christianity were in dispute and it was left for Constantine and his newly converted princes to solve those disputes. Already Constantine had tried unsuccessfully to appease the Donatist quarrel in the west when his attention was attracted to the division of the church in the east by the Arian controversy. It was concerned with the nature of God, with the nature of the Son, and more especially with the relation of the Son to the Father, and, later, with the nature and the relation of the Holy Ghost to the Father and to the Son. In the darkness of Apostasy and after three generations of absolute persecution, Christianity was defining itself anew. However to the emporer, religious divisions meant political divisions, political divisions would not be endured by any Emperor.
Constantine was the lone author of the Council of Nicea. Eusebius gives him full credit and did not even mention the Bishop who presided at the conference. Constantine, himself, takes full credit. Both before and after he spoke of it as the synod he had summoned. Dr, Funk (Kirchengeschichtliche Abhandlungen , t. 1. III, ch. XII) has accumulated many texts and many arguments to show that Constantine acted in his own personal name and on his own initiative.
This unbaptised “Christian” formed it “under the inspiration of God” and out of his own political self interest.
The Bishops arrived at Nicea some time in May but did not begin until June because the most important person had not arrived yet: The Emperor, Gaius Flavius Valerius Aurelius Constantinus
So, what's the fuss about the historical fiction found in the DaVinci Code?