Assyrians are an ethnic group indigenous to Mesopotamia, a geographical region in West Asia. Modern Assyrians share descent directly from the ancient Assyrians, one of the key civilizations of Mesopotamia. While they are distinct from other Mesopotamian groups, such as the Babylonians, they share in the broader cultural heritage of the Mesopotamian region. Modern Assyrians may culturally self-identify as Syriacs, Chaldeans, or Arameans for religious, geographic, and tribal identification.