As a consequence of Assyria's violent downfall, the period from a few years before the death of Ashurbanipal to the Fall of Nineveh in 612 BC suffers from a distinct lack of surviving sources. The annals of Ashurbanipal, the primary sources for his reign, go no further than 636 BC. Although Ashurbanipal's final year is often repeated as 627 BC, this follows an inscription at Harran made by the mother of the Neo-Babylonian king Nabonidus nearly a century later. The final contemporary evidence for Ashurbanipal being alive and reigning as king is a contract from the city of Nippur made in 631 BC. To get the attested lengths of the reigns of his successors to match, most scholars agree that Ashurbanipal either died, abdicated or was deposed in 631 BC. Of the three options, a death in 631 BC is the most accepted. If Ashurbanipal's reign would have ended in 627 BC, the inscriptions of his successors Aššur-etil-ilāni and Sîn-šar-iškun in Babylon, covering several years, would have been impossible since the city was seized by the Neo-Babylonian king Nabopolassar in 626 BC to never again fall into Assyrian hands.
