My exes mother grew up in a fishing village in Dournanez, France. There was a 2nd century roman fish salting facility just above the bay, you could see the foundations very clearly almost 2000 years later.
Wow, thanks!
The level of industrial activity in the Roman Empire is often missed or even ignored because the ruins are a bit dull. Lots of mining, lots of ceramic production (roof tiles, along with various prefab tiles for other purposes such as heating ducts and floor shims), lead, iron, and other processing, and of course the ports needed to move everything.
At its peak the Roman Empire — basically the Med basin, varying sized parts of the Near East, and Western Europe — had an estimated 50 to 100 million people living in it. Massive production and massive consumption. And the reach of Roman trade was enormous, so there are Roman-era and -affiliated ruins well outside Roman rule.
https://www.alamy.com/stock-photo-roman-ruins-at-douarnenez-finistre-brittany-france-38414805.html
https://search.brave.com/search?q=douarnenez%20france%20roman%20ruin