Pin #14 (tied with 5 other Pins) ... Halloween, 1517. Father Martin Luther punks his boss, Pope Leo X with the ultimate Halloween prank: by nailing his famous Ninety-Five Theses to the door of the Castle Church in Wittenberg, Germany, Rev. Martin triggered the Protestant Reformation. "Luther Posting His 95 Theses," painting by Ferdinand Pauwels, 1872.