~15th century sees the rise and development of humanism with its emphasis on ad fontes ("to the sources")
~1450 the printing press is introduced.
1453 is the Fall of Constantinople and "migration of many Greek-speaking scholars begins toward the West." (from this book, The Reformation
1516 is the publishing of Erasmus' Greek New Testament
1517 Luther posts his Theses
So now from my reading it seems pretty obvious that humanism paved the way for the Reformation. My wonder is whether the fall of Constantinople and the aforementioned migration to the west had a direct impact on the development of humanism and/or the Reformation? Especially in terms of availability of said "sources," etc.