Nostradamus is typically so ambiguous in his predictions, a given quatrain may have been applied to any number of historical events.
Given the pliability of the cryptic language Nostradamus uses, I don’t believe his accuracy is much better than random chance.
To me, Jeanne Dixon was little more than a luckier-than-average crackpot. Horoscopes and such. Imagine if she could have plied her trade in the Age of Social Media.
I’ve heard she predicted 2020 will see the biblical ‘end of the world’. I got $50 she’s wrong. We’ll see which one of us is correct.