@coluber2001,
Leonardo Da Vinci is bestowed with so many claims to mythic status when , actually,most of his thoughts were really of his time, were often plagiarized, and really, were not that particularly impressive.(Read the Leicester codex for example)
However, One really important thing I give him, besides his talent as a great artist, was that Leonardo really is the father of "Engineering blue prints"
Some folks claim that the Egyptians had plans shown on their structures but the obvious answer to that was that Egyptian plans were recorded on a "finished structure" and were really not to be used for construction purposes like Leonardos