I believe you misunderstood me. Take any architecture-engineering book before 14th century, and I mean go back to the dawn of man, and you won't even find Pytha

I believe you misunderstood me. Take any architecture-engineering book before 14th century, and I mean go back to the dawn of man, and you won't even find Pythagoras theorem. It was all collection of heuristics that worked and the collections were made from hundreds of years of trial and error. Big buildings in Rome were all built with heuristics that had no formulas. Euclidean geometry in architecture is a modern thing.