A Biography of Constantine I the Great: Constantine and Christianity
Perhaps Constantine's boldest move was to embrace the outlawed faith of the Christians. He hoped that a united Church would be an ally in his rule of the Empire. But the Christians were not as united as he imagined. Whether his embrace of Christianity prolonged the life of the Empire or hastened its demise, it was the Church that preserved classical culture (Lecture 3 of 3 by Dr. W. Neidinger).
