"Hister" is the ancient name for the Danube River.
Nobody ever tells you about all the "prophecies" by Michel de Notre-Dame that were just flat wrong. Like the one in which he predicted prosperity for the King of France - who died before the book went to press . . . oops. But by ignoring the misses and touting the hits (or even the near-hits, or stuff that's just arguably a semi-hit, like the "Hister" business), everybody makes him sound like a prophet.
Interesting. Thanks for the info.
I guess it is easy to want to believe.
Michel de Notre-Dame, the "National Enquirer" of his time. :-)