King of Babylonia (555-539). He succeeded Lâbâši-Marduk after a court conspiracy. The Akkadian form of his name is Nabû-nā’id. Nabonidus was a mature man when he came to power, and, according to his inscriptions (Adad-Guppi stele), he served under the previous Babylonian monarchs. It has been suggested that Nabonidus is to be identified with Herodutus’ “Labinetus the Babylonian” who reportedly intervene in a peace treaty between the Lydians and the Persians. Nabonidus was very active in promoting several building projects and campaigning in Syria and in Arabia. Effectively, he was the last king of the Neo-Babylonian Empire being defeated and captured by the Persians at Babylon in 539 BCE.