1/5/25. The document discusses the significance of the events of 1517, when Martin Luther nailed his 95 theses against indulgences to the door of the castle church in Wittenberg on October 31st. This act marked the beginning of the Protestant Reformation and changed the fate of nations in Europe. Every year since, Protestants around the world commemorate the anniversary of the Reformation. While critics have questioned aspects of the traditional narrative, no one disputes that Luther authored and posted the 95 theses. The Reformation sparked religious and political upheaval across Europe in the centuries that followed.