From the time that the Assyrian rulers claimed a greater or small measure of control over the affairs of Babylonia, that is, therefore, from about the twelfth century, they were anxious to make good their claim by including in their pantheon the chief god of Babylonia. The Assyrian inscriptions prove that, as early as the twelfth century, the theoretical absorption on the part of Marduk, of the role taken by the old god Bel of Nippur, which was enlarged upon in a preceding chapter,[286] had already taken place. Marduk is not only frequently known as Bel, but what is more, Babylonia is the country of Bel, or simply Bel, and the Babylonians are referred to as 'the subjects of Bel,' or the 'humanity of Bel.' There can be no doubt that in all these cases Bel-Marduk is meant and not the older Bel. In the days of Ashurrishishi we already come across the title 'governor of Bel,' that to the latest days remains the official designation for political control over the southern empire. So general is this use of Bel for Marduk that the latter name does not occur until we reach Shalmaneser II., _i.e._, the ninth century. There seems to be no reason to question, therefore, that even when Tiglathpileser I. applies to Bel titles that certainly belong to the older Bel, such as 'father of the gods,' 'king of all the Anunnaki,' 'who fixes the decrees of heaven and earth,' he means Marduk, a proof for which may be seen in the epithet _bel matati_, 'lord of lands,' which follows upon these designations and which, as we saw, is a factor in the evolution of Marduk into Bel-Marduk.[287] The importance that Tiglathpileser I., and therefore also his successors, attached to their control over the old southern district, is shown by his according to Bel the second place in the pantheon, invoking him at the beginning of his inscriptions immediately after Ashur. The control over Babylonia was an achievement that stirred the pride of the Assyrian rulers to the highest degree. Its age and its past inspired respect. Besides being the source of the culture that Assyria possessed, Babylonia had sacred associations for the Assyrians, as the original dwelling-places of most of the gods worshipped by them. The old sacred centers like Ur, Nippur, Uruk, Sippar, with their great temples, their elaborate cults, their great storehouses of religious literature, and their great body of influential priests and theologians and astrologers were as dear to the people of the north as to those of the south; and in proportion as these old cities lost their political importance, their rank as sacred centers to which pilgrimages were made on the occasion of the festivals of the gods was correspondingly raised. Hence the value that the Assyrian rulers attached to the possession of Babylonia. They do not like to be reminded that they rule the south by force of arms. They prefer, as Tiglathpileser I. declares, to consider themselves