The chronicle is thought to have been copied by a scribe during the Seleucid period (4th-1st century BC) but the original text was probably written during the late 6th or early 5th century BC.[3] Similarities with the Nabonassar to Shamash-shum-ukin Chronicle, another of the Babylonian Chronicles, suggest that the same scribe may have been responsible for both chronicles. If so, it may date to the reign of Darius I of Persia (c.