Since the account in Daniel chapter 5 focuses on the events of the night of Babylon’s fall in 539 B.C.E., it does not relate how Belshazzar came to have regal authority.
लेकिन पुरातात्विक स्रोत से नेबोनाइडस व बेलशस्सर के रिश्‍ते की कुछ भनक मिलती है ।