If the native Celts of Ireland had images, there is no reason to suppose, especially considering the evidence just adduced, that the Gauls, or at least the Druids, were antagonistic to images. This last is M. Reinach's theory, part of a wider hypothesis that the Druids were pre-Celtic, but became the priests of the Celts, who till then had no priests. The Druids prohibited image-worship, and this prohibition existed in Gaul, _ex hypothesi_, from the end of palæolithic times. Pythagoras and his school were opposed to image-worship, and the classical writers claimed a connection between the Pythagoreans and the Druids. M. Reinach thinks there must have been some analogy between them, and that was hostility to anthropomorphism. But the analogy is distinctly stated to have lain in the doctrine of immortality or metempsychosis. Had the Druids been opposed to image-worship, classical observers could not have failed to notice the fact. M. Reinach then argues that the Druids caused the erection of the megalithic monuments in Gaul, symbols not images. They are thus Druidic, though not Celtic. The monuments argue a powerful priesthood; the Druids were a powerful priesthood; therefore the Druids caused the monuments to be built. This is not a powerful argument![984] As has been seen, some purely Celtic images existed in Gaul. The Gauls, who used nothing but wood for their houses, probably knew little of the art of carving stone. They would therefore make most of their images of wood--a perishable material. The insular Celts had images, and if, as Cæsar maintained, the Druids came from Britain to Gaul, this points at least to a similarity of cult in the two regions. Youthful Gauls who aspired to Druidic knowledge went to Britain to obtain it. Would the Druids of Gaul have permitted this, had they been iconoclasts? No single text shows that the Druids had any antipathy to images, while the Gauls certainly had images of worshipful animals. Further, even if the Druids were priests of a pre-Celtic folk, they must have permitted the making of images, since many "menhir-statues" exist on French soil, at Aveyron, Tarn, and elsewhere.[985] The Celts were in constant contact with image-worshipping peoples, and could hardly have failed to be influenced by them, even if such a priestly prohibition existed, just as Israel succumbed to images in spite of divine commands. That they would have been thus influenced is seen from the number of images of all kinds dating from the period after the Roman conquest.