Dilmun, or Telmun, was an ancient East Semitic–speaking civilization in Eastern Arabia mentioned from the 3rd millennium BC onwards, covering the transition from Prehistoric Arabia into the historic period. Based on contextual evidence, it was located in the Persian Gulf, on a trade route between Mesopotamia and the Indus Valley Civilisation, close to the sea and to artesian springs. Dilmun encompassed Bahrain, Kuwait, and eastern Saudi Arabia.