Ur Kaśdim or Ur of the Chaldees (אוּר כַּשְׂדִים) is a biblical place mentioned in the Book of Genesis that refers to a location that the Patriarch Abraham may have been from. Not only is there much debate in interpreting Ur Kaśdim as Abraham's birthplace, but also identifying this location.
Read more about Ur Kaśdim: Identifying Ur Kaśdim