Son of Henry
Duke of Saxony, from 936 to 961, German King from 936, and Holy Roman Emperor from 962
Solidified the German Empire by suppressing rebellious vassals and achieving decisive victories over the Hungarians
Elected as king in Aachen on August 7, 936, just a month after Henry's death
Crowned by the archbishops of Mainz and Cologne
Asserting his authority firmly over the feudal lords caused immediate conflict
Strengthened and expanded the borders of his empire
Achieved a decisive victory over the Hungarians in the Battle of Lechfeld near Augsburg in August 955
Subjugated the Slavs living between the middle Elbe and Oder rivers to the German kingdom
Elected and crowned his son as German King
Pope John XII crowned him emperor on February 2, 962 - formation of the Holy Roman Empire
Concluded the Privilegium Ottonianum treaty, regulating the relationship between the emperor and the pope, strengthening and expanding the secular power of the papacy