The Syriac language is a variety of Aramaic language, that emerged in Edessa, Upper Mesopotamia during the first centuries CE. It is related to the Aramaic of Jesus, a Galilean dialect. This relationship added to its prestige for Christians. The form of the language in use in Edessa predominated in Christian writings and was accepted as the standard form, "a convenient vehicle for the spread of Christianity wherever there was a substrate of spoken Aramaic". The area where Syriac or Aramaic was spoken, an area of contact and conflict between the Roman Empire and the Sasanian Empire, extended from around Antioch in the west to Seleucia-Ctesiphon, the Sasanian capital (in Iraq), in the east and comprised the whole or parts of present-day Syria, Lebanon, Israel/Palestine, Iraq, and parts of Turkey and Iran.