The term Ancient Near East or Ancient Orient encompasses the early civilizations predating classical antiquity in the region roughly corresponding to that described by the modern term Middle East (Egypt, the Fertile Crescent, Anatolia), during the time roughly spanning the Bronze Age from the rise of Sumer and Gerzeh in the 4th millennium BCE to the expansion of the Persian Empire in the 6th century BCE. As such, it is a term widely employed in the fields of Near Eastern archaeology, ancient history and Egyptology.