IANAArcheologist-nor-Anthropologist...

The first city is generally considered to be Ur, which "dates from the Ubaid period circa 3800 BC" https://en.wikipedia.org/wiki/Ur

However, there's the Potbelly Hill "dating back to the 10th–8th millennium BCE" https://en.wikipedia.org/wiki/G%C3%B6bekli_Tepe

I've heard of stone cities in Southern Africa that are believed to be older than 100K years, but that's not part of the known archeological record.

Some would argue, and I'm inclined to agree, that civilization could be considered to date to the beginning of the Stone Age, which "lasted for roughly 3.4 million years" https://en.wikipedia.org/wiki/Stone_Age

Stone knives aren't primitive, they're sophisticated ( https://en.wikipedia.org/wiki/Lithic_reduction ), arguably the product of a human (as contrasted with animal) mind.

The 100K years timeframe is more believable than a random cutoff 12K years B.C. Humans are way too advanced species to progress from monkeys to what we are now in just a few thousand years. I'd say it's taken close to 18 millions years since humans were advanced monkeys, but even then the difference between a "regular monkey" and an "advanced monkey that can make tools for hunting" is massive and needs an extended period of prehistory.