What are those giant spikes sticking out of the sea and how the fuck did they build them? There were no divers back so how the fuck did they build a giant sea wall phalanx?
>>17273977>People couldn't dive before God patched the sea in the 20th centuryMan, this really is /pol/ with dates
https://fr.wikipedia.org/wiki/Digue_de_Richelieu
>>17273977I'ts a dike (the foundation of which were sunken ship hulls filled with rubble), which was built to prevent the reenforcment of La Rochelle from the sea - in concert with two artillery forts. The painting you've posted is from 1881. Here a depiction of the obstacle from 1630s painting.
And here a 1740 sketch, which shows the dike in detail.