Such were the circumstances, and such the principles, under which the See of Seleucia became the Rome of the East. In the course of time the Catholicus took on himself the loftier and independent title of Patriarch of Babylon; and though Seleucia was changed for Ctesiphon and for Bagdad,[296:1] still the name of Babylon was preserved from first to last as a formal or ideal Metropolis. In the time of the Caliphs, it was at the head of as many as twenty-five Archbishops; its Communion extended from China to Jerusalem; and its numbers, with those of the Monophysites, are said to have surpassed those of the Greek and Latin Churches together. The Nestorians seem to have been unwilling, like the Novatians, to be called by the name of their founder,[296:2] though they confessed it had adhered to them; one instance may be specified of their assuming the name of Catholic,[296:3] but there is nothing to show it was given them by others. "From the conquest of Persia," says Gibbon, "they carried their spiritual arms to the North, the East, and the South; and the simplicity of the Gospel was fashioned and painted with the colours of the Syriac theology. In the sixth century, according to the report of a Nestorian traveller, Christianity was successfully preached to the Bactrians, the Huns, the Persians, the Indians, the Persarmenians, the Medes, and the Elamites: the Barbaric Churches from the gulf of Persia to the Caspian Sea were almost infinite; and their recent faith was conspicuous in the number and sanctity of their monks and martyrs. The pepper coast of Malabar and the isles of the ocean, Socotra and Ceylon, were peopled with an increasing multitude of Christians, and the bishops and clergy of those sequestered regions derived their ordination from the Catholicus of Babylon. In a subsequent age, the zeal of the Nestorians overleaped the limits which had confined the ambition and curiosity both of the Greeks and Persians. The missionaries of Balch and Samarcand pursued without fear the footsteps of the roving Tartar, and insinuated themselves into the camps of the valleys of Imaus and the banks of the Selinga."[297:1] § 3. _The Monophysites._