Assyriologists have shown that its ancient worship persisted under the Seleucides, and at the time of Strabo the "Chaldeans" still discussed cosmology and first principles in the rival schools of Borsippa and Orchoe.[51] The ascendancy of that erudite clergy affected all surrounding regions; it was felt by Persia in the east, Cappadocia in the north, but more than anywhere else by the Syrians, who were connected with the Oriental Semites by bonds of language and blood. Even after the Parthians had wrested the valley of the Euphrates from the Seleucides, relations with the great temples of that region remained uninterrupted. The plains of Mesopotamia, inhabited by races of like origin, extended on both sides of an artificial border line; great commercial roads followed the course of the two rivers flowing into the Persian Gulf or cut across the desert, and the pilgrims came to Babylon, as Lucian tells us, to perform their devotions to the Lady of Bambyce.[52] {123} Ever since the Captivity, constant spiritual relations had existed between Judaism and the great religious metropolis. At the birth of Christianity they manifested themselves in the rise of gnostic sects in which the Semitic mythology formed strange combinations with Jewish and Greek ideas and furnished the foundation for extravagant superstructures.[53] Finally, during the decline of the empire, it was Babylon again from which emanated Manicheism, the last form of idolatry received in the Latin world. We can imagine how powerful the religious influence of that country on the Syrian paganism must have been.