This dynasty also did not actually rule Babylon, but rather the Sumerian regions south of it. Nevertheless, it is traditionally numbered the Second Dynasty of Babylon, and so is listed here.
According to the Babylonian chronicle known as ABC 2, he was recognized as king on 23 November 626.
The Babylonian historian Berossus tells that the alliance was cemented by a royal wedding: the Babylonian crown prince Nebuchadnezzar married a princess named Amytis.
Its population was deported to Babylonia: the beginning of the Babylonian Exile of the Jews.
Babylonian beliefs held the king as an agent of Marduk, and the city of Babylon as a "holy city" where any legitimate ruler of Mesopotamia had to be crowned.
Cyrus now claimed to be the legitimate successor of the ancient Babyloniankings and the avenger of Bel-Marduk, who was assumed to be wrathful at the impiety of Nabonidus in removing the images of the local gods from their ancestral shrines, to his capital Babylon.
The Babylonian development of methods for predicting the motions of the planets is considered to be a major episode in the history of astronomy.