[1cvmask]

There also some excavations of what could potentially be proto-cities like Boncuklu Tarla which is over 11800 years old and had a sewer system:

https://en.wikipedia.org/wiki/Boncuklu_Tarla

https://www.aa.com.tr/en/culture/archaeologists-unearth-anci...

[kragen]

That's amazing! Thank you! Sounds like the sewer thing is still uncertain.