Ah-ha! FOUND IT! The birth of the Renaissance is thanks to:
  Gemistus Pletho and the otherwise failed Council of Florence
  (1431-1449) [1]https://en.wikipedia.org/wiki/Gemistus_Pletho
  Thanks Gemistus Pletho!
  == It's been driving me nuts on and off for years. The history I
  learned and I *still* keep hearing is that "there were Dark Ages
  then Middle Ages then a revival of lost knowledge which led to
  rationalism to science and then to today". It's of course a very
  narrow view, cutting out important connections. As an adult, I
  learned about the Byzantine Empire and that all that knowledge
  was certainly not lost, just active elsewhere. I knew there had
  to be SOMEBODY who really brought the attention of this stuff
  back to Europe and suspected it had something to do with
  attempts at reconciliation between East and West churches but I
  couldn't put my finger on it. Now I can. [2]#yay smile emoticon

References

  Visible links
  1. https://en.wikipedia.org/wiki/Gemistus_Pletho
  2. https://www.facebook.com/hashtag/yay?hc_location=ufi