It is possible, of course, that fire was regarded as the vital principle by some city cults, which were influenced by imported ideas. If so, the belief never became prevalent. The most enduring influence in Babylonian religion was the early Sumerian; and as Sumerian modes of thought were the outcome of habits of life necessitated by the character of the country, they were bound, sooner or later, to leave a deep impress on the minds of foreign peoples who settled in the Garden of Western Asia. It is not surprising, therefore, to find that imported deities assumed Babylonian characteristics, and were identified or associated with Babylonian gods in the later imperial pantheon. Moon worship appears to have been as ancient as water worship, with which, as we have seen, it was closely associated. It was widely prevalent throughout Babylonia. The chief seat of the lunar deity, Nannar or Sin, was the ancient city of Ur, from which Abraham migrated to Harran, where the "Baal" (the lord) was also a moon god. Ur was situated in Sumer, in the south, between the west bank of the Euphrates and the low hills bordering the Arabian desert, and not far distant from sea-washed Eridu. No doubt, like that city, it had its origin at an exceedingly remote period. At any rate, the excavations conducted there have afforded proof that it flourished in the prehistoric period. As in Arabia, Egypt, and throughout ancient Europe and elsewhere, the moon god of Sumeria was regarded as the "friend of man". He controlled nature as a fertilizing agency; he caused grass, trees, and crops to grow; he increased flocks and herds, and gave human offspring. At Ur he was exalted above Ea as "the lord and prince of the gods, supreme in heaven, the Father of all"; he was also called "great Anu", an indication that Anu, the sky god, had at one time a lunar character. The moon god was believed to be the father of the sun god: he was the "great steer with mighty horns and perfect limbs". His name Sin is believed to be a corruption of "Zu-ena", which signifies "knowledge lord".[66] Like the lunar Osiris of Egypt, he was apparently an instructor of mankind; the moon measured time and controlled the seasons; seeds were sown at a certain phase of the moon, and crops were ripened by the harvest moon. The mountains of Sinai and the desert of Sin are called after this deity. As Nannar, which Jastrow considers to be a variation of "Narnar", the "light producer", the moon god scattered darkness and reduced the terrors of night. His spirit inhabited the lunar stone, so that moon and stone worship were closely associated; it also entered trees and crops, so that moon worship linked with earth worship, as both linked with water worship.