Charlemagne, king of the Franconian tribe, founded the Holy Roman Empire, but is disintegrated by dividing succession without creating a nation, hence he's revered equally by Germany and France (East - viz. West Francia). Father of the medieval German nation, till then little more then a linguistic grouping of the Franconian, Saxon, Bavarian and Swabian (alias Allemannen) tribes (and duchies, the real political entities) was the Saxon duke Otto I, crowned king by the archbishop of Mainz (Mayence) in 961. His authority rested upon the successful defense of Germany, and all Western Europe, against the Magyar (Hungarian) invaders, with whom his brother, the Swabian duke, had allied himself in rivalry for the succession, in the decisive battle on the Lachfeld, mythically ascribed to a Holy Lance, part of the German insignia, actually Carolingian but associated with the Passion of Christ. Later Otto turned to Italy, where he was crowned Roman Emperor by the pope, thus defining the Holy Rman Empire of the German Nation, and the German people got its name, after the Ancient Teutonic tribe. To gain Byzantinian recognition, Otto wed his son Otto II with princess Theophane.