 New creeds were drawn up to counter the homoousian doctrine of the Nicene Creed.When Theodosius I took the imperial throne, however, the tables were turned, and at the Council of Constantinople in 381, the position that the Father, the Son and the Holy Ghost were all the same being was agreed upon, and the formulation of the doctrine of the Trinity was complete.Theodosius outlawed all Nontrinitarian forms of Christianity.