Empire, (). Der rîche was a title for the Emperor. However, Latin, not German, was the formal legal language of the medieval Empire (), so English-speaking historians are more likely to use Latin than German as a term for this period of German history. The common contemporary Latin legal term used in documents of the Holy Roman Empire was for a long time regnum ("rule, domain, empire", such as in Regnum Francorum for the Frankish Kingdom) before imperium was in fact adopted, the latter first attested in 1157, whereas the parallel use of regnum never fell out of use during the Middle Ages. Modern age At the beginning of the modern age, some circles redubbed the HRE into the "Holy Roman Empire of the German Nation" (), a symptom of the formation of a German nation state as opposed to the multinational state the Empire was throughout its history. Resistance against the French revolution with its concept of the state brought a new movement to create a German "ethnical state", especially after the Napoleonic wars. Ideal for this state was the Holy Roman Empire; the legend arose that Germany were "un-defeated when unified", especially after the Franco-Prussian War (, lit. "German-French war"). Before that, the German question ruptured this "German unity" after the 1848 Revolution before it was achieved, however; Austria-Hungary as a multinational state could not become part of the new "German empire", and nationality conflicts in Prussia with the Prussian Poles arose ("We can never be Germans – Prussians, every time!"). The advent of national feeling and the movement to create an ethnically German Empire did lead directly to nationalism in 1871. Ethnic minorities declined since the beginning of the modern age; the Polabs, Sorbs and even the once important Low Germans had to assimilate themselves. This marked the transition between Antijudaism, where converted Jews were accepted as full citizens (in theory), to Antisemitism, where Jews were thought to be from a different ethnicity that could never become German. Apart from all those ethnic minorities being de facto extinct, even today the era of national feeling is taught in history in German schools as an important stepping-stone on the road to a German nation. German Reich In the case of the Hohenzollern Empire (1871–1918), the official name of the country was Deutsches Reich ("German Realm"), because under the Constitution of the German Empire, it was legally a confederation