The emperor would travel to different castles in his empire, just as the kings and queens of England would travel in southern England in the seventeenth and eighteenth centuries. The emperor designated certain nobles to manage the castles to which he travelled, and gave these nobles authority over different districts within the empire. The castle-keepers were called "count palatines" and two separate districts along the Rhine and Danube rivers were called the Palatinate. Both are in modern Germany today.
Religious repression of the Protestants in these two areas drove many to emigrate to the English colonies in the New World. They were welcomed by Governor Spotswood, who sought to increase population in the Rappahannock River drainage, but many also settled in the Shenandoah Valley.
Ernst Augustus picked the winning side in the Grand Alliance fighting Louis XIV of France. For this, he was "elevated" in status to be the Elector of Hanover and entitled to vote for the Austrian Emperor. And the Elector's son would also become King George I of England. His family, now called the House of Windsor rather than Hanover after the tensions of World War I, still sits on that throne.