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While some historians believe that the youth emigrated to Transylvania, the German linguist Jürgen Udolph’s theory is most accepted. “He suggests the regions around Berlin as the most probable location, in an area that’s now [eastern Germany].” http://www.bbc.com/travel/story/20200902-the-grim-truth-behind-the-pied-piper
@estherschindler
That's interesting, but they're a bit off on St. Vitus's dance. That's a complication of rheumatic fever. It the pre-penicillin era, anyone would have been familiar with it.
https://www.youtube.com/watch?v=RsIQFeYOkAg