Nabonidus was the last king of the Neo-Babylonian Empire, reigning from 556 to 539 B.C.E. Beset by political problems and economic difficulties in Babylonia, Nabonidus decided to appoint his son Belsharusur as regent ("King Belshazzar" in the Bible: Dan. 5:22; 7:1; 8:1), while he himself moved west ...