It's about him all right. Well, he explains it in the end.
Lots of alchemy, metaphysics of the Kingdom of France, freely interpreted history, but it's worth watching, because you'll enjoy spotting all the little tidbits: "hey, I heard of that, but it was different in reality, and that, and him.."

I'm pretty impressed by the laxness of the comments. Last time Chevalier and Rose of Versailles was mentioned the discussion was a lot more heated!