Setting the scene
By 962 CE, Germany was fragmented after the Carolingian Empire's collapse. The East Frankish kingdom was divided among dukes who elected kings but limited their power. Otto I, Duke of Saxony, was elected king in 936. He was a strong ruler who defeated the Magyars at Lechfeld in 955, ending their raids, and subdued rebellious dukes. Otto intervened in Italy to protect Pope John XII from Italian king Berengar II, and was crowned King of Italy in 961.
What happened
On February 2, 962, in Rome, Pope John XII crowned Otto I as Emperor, reviving the title of Holy Roman Emperor that had lapsed since 924. Otto's coronation established the Holy Roman Empire, which would last until 1806. Otto saw himself as Charlemagne's successor, protector of Christendom, and the pope's champion. The empire was a loose confederation of German duchies, Italian cities, and other territories, with the emperor elected by German princes but claiming universal authority.
Why it still matters
The Ottonian Empire (962-1024) created the political framework for medieval Germany and the concept of the Holy Roman Empire. It established the close but contentious relationship between German emperors and popes, leading to the Investiture Controversy in the 11th century. Otto's dynasty promoted the Ottonian Renaissance, a revival of art and learning. The empire's elective nature and decentralization prevented Germany from developing a strong centralized monarchy like France or England. The 962 coronation marks the beginning of the Holy Roman Empire, which Voltaire later quipped was 'neither holy, nor Roman, nor an empire,' but which shaped Central European history for 800 years.
Background
This is often treated as the start of the Holy Roman Empire. Even centuries later, this episode remains a reference point for how empires rise, fracture, and transform.