What if Napoleon Won? (Alternative History)

Napoleon Bonapart, One of the greatest conquers the world has ever seen. Shoulder to shoulder with the likes of Julius Caesar and Ghengis Khan. He took france from a nation tearing at the seems, teetering on total collapse, to the master of Europe. An entire continent under his heel. But he would stumble, and his mastery over Europe would come to a sudden and complete end. But what if, in an alternative timeline, napoleon never fell, and maintain himself as the hegemon of continental Europe.