The Stela of King Nabonidus is a carved basalt monument dating to the reign of Nabonidus (556–539 BC), the last ruling king of the Neo-Babylonian Empire. Acquired by the British Museum from Babylonia, the stela bears a relief depicting Nabonidus in a posture of veneration before the astral emblems of Sin (the moon-god), Shamash (the sun-god), and Ishtar (represented by the planet Venus), accompanied by a cuneiform inscription articulating his pious devotion and royal ideology. The monument reflects Nabonidus's well-documented and controversial elevation of the moon-god Sin above the Babylonian pantheon, a theological program that alienated the Marduk priesthood in Babylon and contributed to political tensions during his reign. Crucially, the broader corpus of Neo-Babylonian administrative and chronicle texts — most notably the Nabonidus Chronicle — establishes that Nabonidus spent extended periods at the Arabian oasis of Tayma, leaving his son Belshazzar as effective regent in Babylon. This arrangement, attested in multiple cuneiform sources, supplies the historical framework for understanding Daniel 5, where Belshazzar is presented as king and offers Daniel the position of 'third ruler' in the kingdom — a title consistent with Belshazzar's own subordinate rank as co-regent. The stela itself does not mention Belshazzar, but together with the chronicle tradition it situates the Daniel narrative within historically verifiable Neo-Babylonian court structures. The astral religion prominently displayed on the stela parallels the cultic setting against which the biblical court stories are framed, providing context rather than corroboration for those accounts. Sources: British Museum (BM 90837); Amélie Kuhrt, The Ancient Near East c. 3000–330 BC (Routledge, 1995); Assyrian and Babylonian Chronicles, A.K. Grayson (Locust Valley, 1975); Alan Millard, 'Daniel and Belshazzar in History,' Biblical Archaeology Review 11.3 (1985).
The stela, read alongside the Nabonidus Chronicle and related cuneiform administrative texts, confirms that Belshazzar functioned as royal co-regent in Babylon under his father Nabonidus, directly illuminating why Daniel 5 presents him as king and why the highest honor he could bestow was the rank of third ruler in the realm.
