public mourning followed, lasting six days, and Cyrus' son Cambyses accompanied the corpse to the tomb. One of the first acts of Cyrus accordingly was to allow the Jewish exiles to return to their own homes, carrying with them their sacred temple vessels. The permission to do so was embodied in a proclamation, whereby the conqueror endeavored to justify his claim to the Babylonian throne. Cyrus now claimed to be the legitimate successor of the ancient Babylonian kings 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 Chaldean tribe had lost control of Babylonia decades before the end of the era that sometimes bears their name, and they appear to have blended into the general populace of Babylonia even before this (for example, Nabopolassar, Nebuchadnezzar II and their successors always referred to themselves as Shar Akkad and never as Shar Kaldu on inscriptions), and during the Persian Achaemenid Empire the term Chaldean ceased to refer to a race of people, and instead specifically to a social class of priests educated in classical Babylonian literature, particularly Astronomy and Astrology. By the mid Seleucid Empire (312–150 BC) period this term too had fallen from use. Fall of Babylon Babylonia was absorbed into the Achaemenid Empire in 539 BC, becoming the satrapy of Babirush ( Bābiruš). A year before Cyrus' death, in 529 BC, he elevated his son Cambyses II in the government, making him king of Babylon, while he reserved for himself the fuller title of "king of the (other) provinces" of the empire. It was only when Darius I acquired the Persian throne and ruled it as a representative of the Zoroastrian religion, that the old tradition was broken and the claim of Babylon to confer legitimacy on the rulers of western Asia ceased to be acknowledged. Immediately after Darius seized Persia, Babylonia briefly recovered its independence under a native ruler, Nidinta-Bel, who took the name of Nebuchadnezzar III, and reigned from October 522 BC to August 520 BC, when Darius took the city by storm, during this period Assyria to the north also rebelled. A few years later, probably 514 BC, Babylon again revolted under the Urartian king Nebuchadnezzar IV; on this occasion, after its capture by the Persians, the walls were partly destroyed. The Esagila,