ARCHAEOLOGY: Post Babel France?

Q: Possibly some of the earliest post-Babel settlers who still remembered building techniques as compared to the other peoples who degenerated into "barbarians" who simply followed receding ice sheets long enough over several generations and forgot those techniques thus becoming foragers living off the land in caves and huts?

Therefore is the name of it called Babel; because the LORD did there confound the language of all the earth: and from thence did the LORD scatter them abroad upon the face of all the earth. Genesis 11:9

"Archaeologists have uncovered the remains of a gigantic "sunken

city" off the coast of western France.
The discovery, made near the Ile de Sein, points to an advanced coastal civilization which existed more than 5,000 years ago.
The site includes a substantial granite wall resting on the seabed, along with at least twelve smaller constructions sitting below the waves.

Researchers say the findings demonstrate a level of sophistication previously unheard of for this era in France.

The buildings reveal that the ancient French possessed technical skills and social organization far beyond what is commonly believed.
The largest structure stretches 120 meters across a submerged valley.
Divers explored the site between 2022 and 2024, finding stacked granite blocks supported by more than 60 standing monoliths.
Some stone slabs reach nearly two meters in height." 

GBN