Theodosian Code XVI.1.2
It is our desire that all the various nation which are subject to our clemency and moderation, should continue to the profession of that religion which was delivered to the Romans by the divine Apostle Peter, as it has been preserved by faithful tradition and which is now professed by the Pontiff Damasus and by Peter, Bishop of Alexandria, a man of apostolic holiness. According to the apostolic teaching and the doctrine of the Gospel, let us believe in the one diety of the father, Son and Holy Spirit, in equal majesty and in a holy Trinity. We authorize the followers of this law to assume the title Catholic Christians; but as for the others, since in out judgment they are foolish madmen, we decree that the shall be branded with the ignominious name of heretics, and shall not presume to give their conventicles the name of churches. They will suffer in the first place the chastisement of divine condemnation an the second the punishment of out authority, in accordance with the will of heaven shall decide to inflict.
from Henry Bettenson, ed., Documents of the Christian Church, (London: Oxford University Press, 1943), p. 31 [Short extract used under fair-use provsions]