When was the first Concrete Foundation laid....does anyone know i am curios.
Answers: The Romans invented or discovered poured concrete. It be way earlier the 15th century. Interestingly, the recipe for concrete was lost during the middle ages (dark ages) and redicovered subsequently.
The pyramids are on a limestone foundation, which is a main ingredient of concrete.
For concrete to be exact closer to what we use today, it would go put a bet on to the 15th century with the Roman Empire.
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