His contemporaries called him "stupor mundi",
the astonishment of the world. Indeed, Frederick II
of Hohenstaufen (1194-1250) was an uncommon monarch.
This Holy Roman Emperor, King of Sicily and Germany,
...
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an interesting summary, Paul, that had me searching for more.
Interesting story, but no rhymes nor structure isn't what I search. But about the infant esperiment, if a human doesn't learn a lenguage to a certain age, then it will never learn any lenguage. The brain lost his linguistic abilities. I don't remember which age is the limit to learn.