Re: Why is the lowest note on the piano an A?
It's wrong. But wrong answers are answers, too!
It's also an awesome piece of Classic Neo-Platonic Art.
And it's funny.
Laugh.
You can downvote it, as a "vote against obsolete ideas" if you like.
But it also reinforces an obvious answer to why begin there? viz. because that's where the letters begin. A B C.