Me : Err, no. That was thousands of years ago.
X : I mean business mapping?
Me : I created my form of mapping now known as Wardley Maps, 13 years ago. It's all creative commons.
X : But what is the first business map?
Me : I don't know of any others.
Me : I doubt it. Never forget Sivowitch's Law of Firsts - "Whenever you prove who was first, the harder you look you will find someone else who was more first"
X : So was it the first or wasn't it?
Me : Who cares? Do you find it useful? Live in today.
Me : I'd be like ... great. Where were you hiding it? Is it a map? Is it a better map?
X : But then you wouldn't be first?
Me : Arghhh. I don't care. Never did. I only care if something is useful.
Me : A legacy implies I'll be dead, so I promise you I'll care even less. In any case, anything you do then someone will find a better way. That's progress, that's evolution and it's a good thing. We should celebrate that.
Me : Ok, so they are first maps of business as far as I know i.e. I've never found any others that were actually maps. There are probably hundreds of maps out there but I never found any of them. Go dig, indulge your passion.