Yeah, that is a fascinating question. Apparently there is evidence of high civilization in Turkey (and perhaps in South America) prior to the Sumerians but not much has been excavated of it yet. Of course, determining the time of something becomes almost a matter of faith when there is no writing.
One of the most fascinating and mysterious sites is Puma Puku in Bolivia or Peru. Too lazy to look it up. But the workmanship of the stones is at today’s standards or better.

Puma Piku............Hilliary's original home base?..................
“Apparently there is evidence of high civilization in Turkey “
NO
Armenia
which Turkey took over much of in 1915 [Armenian genocide]
Don’t give Turkey credit for what is not theirs.