The Nabonidus Chronicle is an ancient Babylonian text, part of a larger series of Babylonian Chronicles inscribed in cuneiform script on clay tablets. It deals primarily with the reign of Nabonidus, the last king of the Neo-Babylonian Empire, covers the conquest of Babylon by the Persian king Cyrus the Great, and ends with the start of the reign of Cyrus's son Cambyses, spanning a period from 556 BC to some time after 539 BC. It provides a rare contemporary account of Cyrus's rise to power and is the main source of information on this period;[1] Amélie Kuhrt describes it as "the most reliable and sober [ancient] account of the fall of Babylon."[2]