What was the major event that was happening during the reformation?

In October 1517, in Wittenberg, Germany, Martin Luther posted his 95 Theses on the door of a town church.This is the catalyst which led to the Protestant Reformation. 

Sir thomas more, venerated in the catholic church as saint thomas more, was an english lawyer, social philosopher, author, statesman, and noted renaissance humanist. he was also a councillor to henry viii, and lord high chancellor of england from october 1529 to 16 may 1532. i found this information on wikipedia