What is "borsippa"

Borsippa ( Sumerian: BAD.SI.(A).AB.BA; Akkadian: Barsip and Til-Barsip) or Birs Nimrud (having been identified with Nimrod) is an archeological site in Babylon Province, Iraq. The ziggurat, the "Tongue Tower," today one of the most vividly identifiable surviving ziggurats, is identified in the later Talmudic and Arabic culture with the Tower of Babel. However, modern scholarship concludes that the Sumero-Akkadian builders of the Ziggurat in reality erected it as a religious edifice in honour of the local god Nabu, called the "son" of Babylon's Marduk, as would be appropriate for Babylon's lesser sister-city.

Borsippa was an important ancient city of Sumer, built on both sides of a lake about southwest of Babylon on the east bank of the Euphrates.