I know most of NOL‘s American readers are familiar with the German question that puzzled the Allies after World War II, but there was a different German Question that puzzled statesmen and policymakers in the 19th century:
From 1815 to 1866, about 37 independent German-speaking states existed within the German Confederation. The Großdeutsche Lösung (“Greater German solution”) favored unifying all German-speaking peoples under one state, and was promoted by the Austrian Empire and its supporters. The Kleindeutsche Lösung (“Little German solution”) sought only to unify the northern German states and did not include any part of Austria (either its German-inhabited areas or its areas dominated by other ethnic groups); this proposal was favored by the Kingdom of Prussia.
While a number of factors swayed allegiances in the debate, the most prominent was religion. The Großdeutsche Lösung would have implied a dominant position for Catholic Austria, the largest and most powerful German state of the early 19th century. As a result, Catholics and Austria-friendly states usually favored Großdeutschland. A unification of Germany led by Prussia would mean the domination of the new state by the Protestant House of Hohenzollern, a more palatable option to Protestant northern German states. Another complicating factor was the Austrian Empire’s inclusion of a large number of non-Germans, such as Hungarians, Czechs, South Slavs, Italians, Poles, Ruthenians, Romanians and Slovaks. The Austrians were reluctant to enter a unified Germany if it meant giving up their non-German speaking territories.
This is from Wikipedia, and it appears that the German Question of the 20th century was still the same one as the 19th century. It took an invasion by the Soviet Union and the United States to decisively answer the question. Happy Easter!