

January 18, 1871: Wilhelm I is proclaimed German Emperor.
Ten days before the fall of France to German forces and seven months into the Franco-Prussian War, William Frederick Louis of the House of Hohenzollern, then king of Prussia, was proclaimed emperor of the new unified German Empire, which succeeded the kingdoms of Prussia, Bavaria, and Württemberg, the duchies of Baden and Hesse, the North German Confederation, and the annexed (previously French-held) territory of Alsace-Lorraine. The new German Empire was a federation of twenty-seven states, the largest of which was Prussia, and its emperor’s full titles were:
His Imperial and Royal Majesty William the First, by the Grace of God, German Emperor and King of Prussia; Margrave of Brandenburg, Burgrave of Nuremberg, Count of Hohenzollern; sovereign and supreme Duke ofSilesia and of the County of Glatz; Grand Duke of the Lower Rhine and of Posen; Duke of Saxony, of Westphalia, of Angria, of Pomerania, Lunenburg, Holstein and Schleswig, of Magdeburg, of Bremen, of Guelders,Cleves, Jülich and Berg, Duke of the Wends and the Kassubes, of Crossen, Lauenburg and Mecklenburg; Landgrave of Hesse and Thuringia; Margrave of Upper and Lower Lusatia; Prince of Orange; Prince of Rügen, of East Friesland, of Paderborn and Pyrmont, of Halberstadt, Münster, Minden, Osnabrück, Hildesheim, of Verden, Cammin, Fulda, Nassau and Moers; Princely Count of Henneberg; Count of Mark, of Ravensberg, of Hohenstein, Tecklenburg and Lingen, of Mansfeld, Sigmaringen and Veringen; Lord of Frankfurt.
His title was notably “German Emperor” and not “Emperor of Germany”, though he preferred the latter.
The German Empire was officially established in the Hall of Mirrors of the Palace of Versailles, the same location where, nearly half a century later, the Treaty of Versailles would dismantle the empire, to be replaced by the Weimar Republic.