Towards the end o of the sixth centur y, when Christianity was again propagated in this country by Augustine, Mellitus, and other zealous monks, St. Gregory, the head of the Papal church, and the originator of this mission, wrote to Mellitus not to suffer the Heathen temples to be destroyed, but only the idols found within them. These, and such churches built by the Romans as were then, though in a dilapidated state, existing, may reasonably be supposed to have been the prototypes of the Christian churches