[bill1952]

I would modify that to state that "Roman Concrete is a well known and recorded historical fact."

It transformed architecture by allowing a far more plastic building design compared to prior post and lintel designs.

[bill1952]

but that wasn't prehistoric.

[wildbill]

I would modify "it transformed architecture by allowing a far more plastic building design compared to prior post and lintel designs" to: including spacious arches and domes like the Pantheon--until the knowledge of its chemocological makeup was lost during the Dark Ages.

[Drammach]

You are correct concerning "roman concrete"..
The first known instances of actual concrete, cement with an aggregate base such as gravel, was roman...

The Egyptians used a limestone based mortar or cement, but did not use concrete per se..
IIRC, while there was some use of the egyptian cement in casting, such castings were decorative, not structural..

[Drammach]

I would modify that to state that "Roman Concrete is a well known and recorded historical fact."

Exactly..
As noted in the article, the Egyptians used a type of "cement", not "concrete"...

It was the Romans that discovered / invented the use of an "aggregate" to make concrete..
History does not show the Egyptians making that crucial step..

This would be a totally new use of cement for Egypt, as so far their cement was used for decorative castings of statues, and small ornamental architectural features...
It is, however, possible..