Austria–Germany relations Austria–Germany relations Relations between Austria and Germany are close, due to their shared history and language, with German being the official language and Germans being the largest ethnic group of both countries. Modern-day Austria and Germany were united until 1866: their predecessors were part of the Holy Roman Empire and the German Confederation until the unification of German states under Prussia in 1871, which excluded Austria. In 1918 after the end of World War I, Austria renamed itself the Republic of German-Austria in an attempt for union with Germany but this was forbidden by the Treaty of Saint-Germain-en-Laye (1919). In
Austria–Hungary relations relinquish this city, so the Allied powers ordered a referendum, which the Hungarians won. Although many Austrians considered the polls to be irregular, the decision was treated as definitive. The area called Burgenland by the Austrians was handed over to Austria in the autumn of 1921. Even today, Hungarian may be used as an official language in some communities of Burgenland. Hungarian aristocrats like the Esterházys and Batthyanys kept their vast estates in Austria, even after their Hungarian estates were expropriated in 1945. Political development of Hungary and Czechoslovakia towards communist regimes after 1945 made Austrian politicians extremely cautious in