But Babylonia itself was a dual State. It was probably on this account that Lugal-zaggi-ṡi had fixed his capital at Erech in the centre of the country, midway between north and south. And the gods of Northern Babylonia were not necessarily those of the south. Here Ea was at the head of the divine host; for the south his city of Eridu was what Nippur was for the north, and the same causes which made Bel the dispenser of power to the northern princes, made Ea the guardian and guide of the monarchy in the south. For their worshippers Bel and Ea stood on the same level; the cult of each alike had descended from a remote antiquity, and their priests exercised a similar influence and power. As the [pg 313] Babylonians of the north were called the people of Bel whom Bel could grant to whom he would, so too the mixed races of the south were the creation of Ea to whom the god of Eridu had taught the arts of life.

The union of north and south consequently brought with it the formation of a divine triad. Ea joined himself to Bel and Anu, and the supreme triad of Anu, Bel, and Ea thus came into existence. The process of formation was facilitated by the fact that the three gods were already distinguished from one another in their main features. Anu was the god of the sky; the earlier history of Bel had given him naturally the dominion of the earth; and though, in becoming a Semitic Baal, he had acquired the attributes of a god of the upper sphere, these were allowed to fall into the background. Ea was even easier to deal with; his home was in the deep, and his rule was accordingly confined to the waters and the sea. That he had once been a god of the land as well as of the sea, was dropped out of sight, and in the later centuries of Babylonia it even began to be forgotten that he had created man out of the dust of the ground. He ceased to be the divine potter, and became instead the god of the waters, who pours out the Tigris and Euphrates from the vases in his hands. As god of the earth and the living things upon it, his place was taken by his son. Aṡari, transformed into the Semitic sun-god Merodach, became the inheritor of his father's wisdom, and therewith of his father's power.

The formation of the Babylonian triad, and the differentiation of the divine persons who composed it, must have been the work of a theological school. It is an artificial scheme elaborated after the union of the northern and southern parts of the country. The universe is divided between the three divine representatives of Northern, Central, and Southern Chaldæa, whose [pg 314] sanctuaries were the oldest in the land, and whose cult had been handed down from time immemorial. The triad once formed became a model after which others could be created. The other great gods followed the example that had been set them, and were similarly resolved into triads. As the orthodox theological system of Egypt rested on the Ennead, the corresponding Babylonian system rested on the triad. The principle in each case was much the same. The Ennead was but a multiple of the triad, and presupposed the sacred number. Perhaps we may see in it the result of a contact between Sumerian modes of thought and the Semitic conception of the divine family. Where the god had a wife and a son, the godhead would naturally be regarded as a trinity.[245]

Under the first and supreme triad came the second triad of Sin, Samas, and Hadad. Sin, the moon-god, was adored under many names and in many forms. But his two chiefest temples were at Ur and at Harran. Ur, the modern Muqayyar, on the western bank of the Euphrates, had been dedicated to his service from the earliest times. The ruins of his temple still rise in huge [pg 315] mounds from the ground. The city stood outside the limits of the Babylonian plain, in the Semitic territory of the Arabian desert, and its Semitic population was therefore probably large. Harran, the other seat of the moon-god, was equally beyond the limits of Babylonia, and guarded the high road of commerce and war that led from the East to the West. But the name Harran, “the road,” is Babylonian, and, like its temple and god, the city doubtless owed its origin to Babylonian colonists. They probably came from Ur.

The moon-god of Ur is called the son of En-lil of Nippur, and it may be therefore that Nippur was the mother-city of Ur. But it must be remembered that whereas Ur was built on the desert plateau of Arabia, Nippur stood among the marshes of the Babylonian plain. Its sanctuary could not have been founded before the marshes had been, at all events, partially drained, and the inundating rivers been regulated by dykes and canals. A settlement on the higher and drier ground would seem more naturally to precede one in the pestiferous swamps below it, and the fact that Ur was the neighbour of Eridu seems to point to its early foundation and connection with the old seaport of the country. At the same time the worship of the moon-god is associated with the Semites of Arabia and the west rather than with Eridu, whose god revealed himself to mankind by day and not in the shades of night.[246]

It was right and fitting, however, that the moon-god [pg 316] should be “the firstborn” of the god of Nippur. The realm of En-lil was in the underground world of darkness, and the spirits over whom he had ruled plied their work at night. Naturally, therefore, it was from him and the dark world which originally belonged to him that the moon-god proceeded. It may be that Sin had once been one of the spirits in the domain of En-lil, a mere ghost whom the sorcerer could charm. But with his elevation to the rank of a god his attributes and character grew fixed and defined. In the ancient hymns addressed to him he is far more than a mere god of the moon. His worshipper at Ur, where he was known under the name of Nannar, addressed him as not only “lord of the moon,” but also “prince of the gods,” “the begetter of gods and men.” It is thus that we read in an old bilingual hymn—

“Father, long-suffering and full of forgiveness, whose hand upholds the life of all mankind,

Lord, thy divinity, like the far-off heaven, fills the wide sea with fear ...

Firstborn, omnipotent, whose heart is immensity, and there is none who shall discern it ...

Lord, the ordainer of the laws of heaven and earth, whose command may not be [broken] ...