 "Chaldea" or "mat Kaldi" generally referred to the low, marshy, alluvial land around the estuaries of the Tigris and Euphrates, which at the time discharged their waters through separate mouths into the sea.The tribal capital "Dur Yâkin" was the original seat of Marduk-Baladan.The king of Chaldea was also called the king of Bit Yakin, just as the kings of Babylonia and Assyria were regularly styled simply king of Babylon or Assur, the capital city in each case.