Otto I Is Crowned Emperor, Founding the Holy Roman Empire
The German king becomes protector of the papacy, and the Reich that would last until 1806 begins
Quick facts
- Location
- Old St. Peter's Basilica, Rome
- Crowned by
- Pope John XII
- Realms joined
- Kingdom of Germany and Kingdom of Italy
- Empire's end date
- 1806 (dissolved under Napoleon's pressure)
What happened
Otto I, king of the East Frankish kingdom that had emerged from the division of Charlemagne's empire, marched into Italy at the request of Pope John XII, who needed a strong military patron to defend the papacy against Italian rivals. On 2 February 962, John XII crowned Otto emperor at Old St. Peter's Basilica in Rome, reviving the imperial title Charlemagne had held a century and a half earlier. The coronation joined the Kingdom of Germany and the Kingdom of Italy into one realm under Otto, an arrangement later generations called the Holy Roman Empire, and Otto's wife Adelaide of Italy was anointed empress alongside him.
Why it matters
This is the conventional starting point historians use for the Holy Roman Empire, an entity that would nominally govern German-speaking Central Europe, with wildly varying real authority, for the next 844 years. It also fixed the pattern of German kings needing to march to Rome for papal coronation to claim the imperial title, a requirement that dragged German rulers into Italian politics for centuries and fed directly into the Investiture Controversy a century later.
How we know
Otto's coronation is recorded in contemporary chronicles including the works of Widukind of Corvey and Liudprand of Cremona, an Italian bishop who was present at Otto's court and wrote a detailed account of Ottonian Italian policy.
Sources
- World History Encyclopedia. Holy Roman Empire · Reputable sourceworldhistory.org · The domain "worldhistory.org" is on our Reputable source registry. · Link is live and its text matches the event's key terms (Jul 2026)
- Deutschlandmuseum. The establishment of the Holy Roman Empire · Unclassified sourcedeutschlandmuseum.de · Cited as a "website" source (no stronger domain match). · Link is live and its text matches the event's key terms (Jul 2026)
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