The fall of Babylon is a term often used to denote the end of the Neo-Babylonian dynasty after being conquered by the Persians (Achaemenid Empire) in 539 BCE. In the final years of the Neo-Babylonian dynasty, Nabonidus (Nabû-na'id, 556–539 BCE), son of the Assyrian priestess Adda-Guppi, came to throne as king of Babylon in 556 BCE, after overthrowing the young king Labashi-Marduk.