It's plenty hard in an age before mechanization. You have to: -source materials and have them delivered -employ expert engineers and craftsmen -manage the fi

It's plenty hard in an age before mechanization. You have to: -source materials and have them delivered -employ expert engineers and craftsmen -manage the financial needs of a project without electronic communication -ensure safety without the sophisticated techniques and supplies we take for granted in construction today (hard hats?) It's worth noting that the great pyramid of Giza was actually the third attempt, after the first pyramid collapsed under construction and the second had to be "bent" to avoid collapse as well. So I think it's fair to say that big building was actually quite difficult, even for seemingly simple projects.