It's a good place to root it. Have a look at:
   [1]https://en.wikipedia.org/wiki/Gemistus_Pletho and his
   connection to Byzantium for without him as well as the Eastern
   Orthodox monk that wanted him to come (who said "no" to
   Purgatory and the Latin Pope) and the otherwise failed Council
   of Florence, the Byzantine education would not likely have made
   it to the West before the fall of Byzantium, spawning the
   translations that spawned the schools that led to the
   Renaissance humanistic movement. Quite an amazing chain of
   events. It's unfortunate that Gemistus Pletho often doesn't get
   the mention he deserves in our received cultural narrative. The
   way our narrative tends to read, humanism appears to almost be a
   natural consequence, as if some kind of inevitable progress, a
   holdover from older 19th century narratives which had strange
   tales of ages Dark and Middle, some of which are still being
   taught today, improperly so.

References

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   1. https://l.facebook.com/l.php?u=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FGemistus_Pletho&h=eAQGQB9Te