Encrypted cuneiform texts of a Sumerian priestess and king's daughter, lost and unrecognized since Babylon, contain numerous factual references backed up by other sources, which fundamentally supplement our historical knowledge for the time before and after the Great Flood. These texts do not show "divine" aspects, but rather provide sobering insights into the state religion of that time and demonstrate extensive interventions from the firmament. They also describe in precise detail the technological achievements of this prehistoric period, the renewed realization of which we have only succeeded in achieving in the last century or which still lie in the future.