Hellenistic religion is any of the various systems of beliefs and practices of the peoples who lived under the influence of ancient Greek culture during the Hellenistic period and the Roman Empire (ca. 300 BCE to 300 CE). The Hellenistic period constitutes one of the most creative periods in the history of religions. It can be described as a time of spiritual revolution in the Greco-Roman world, where old cults died or were completely transformed, and where new religions were born.