Iranian Jews constitute one of the oldest communities of the Jewish diaspora. Dating back to the biblical era, they originate from the Jews who arrived in Iran as Babylonian captives. Books of the Hebrew Bible bring together an extensive narrative shedding light on contemporary Jewish life experiences in ancient Iran; there has been a continuous Jewish presence in Iran since at least the time of Cyrus the Great, who led the Achaemenid army's conquest of the Neo-Babylonian Empire and subsequently freed the Judahites from the Babylonian captivity.