Nabonidus Cylinder, 555-540 BCE
The Nabonidus Cylinder from Sippar is a foundation text in which king Nabonidus of Babylonia (556-539) describes how he carefully repaired three temples. It names Belshazzar (Daniel 5:29-30) as son of Babylonian King Nabonidus. The Nabonidus Cylinder is currently on display at the British Museum.
For more on Nabonidus, see Zionism Revisited: Nabonidus, Cyrus, and the Return to Zion, Bryna Jochebed Levy, copyright COJS.