 The earliest positively proven historical attestation of any Semitic people comes from 30th century BC Mesopotamia, with the East Semitic-speaking peoples of the Kish civilization, entering the region originally dominated by the people of Sumer (who spoke a language isolate).Between the 30th and 20th centuries BC, Semitic languages covered a broad area covering much of the Ancient Near East, including the Levant, Mesopotamia, Arabia and the Sinai Peninsula.The earliest written evidence of them are found in the Fertile Crescent (Mesopotamia) c. the 30th century BC, an area encompassing Sumer, the Akkadian Empire and other civilizations of Assyria and Babylonia along the Tigris and Euphrates (modern Iraq, northeast Syria and southeast Turkey), followed by historical written evidence from the Levant, Canaan, Sinai Peninsula, southern and eastern Anatolia and the Arabian Peninsula.