Year by year · 9th century

855 CE

855 CE in world history: 3 events, 1 death, 2 states founded and 1 that came to an end. 345 recorded states existed that year.

Events

  1. 29 September

    Pope Benedict III is restored by a popular uprising

    After Louis II of Italy, Carolingian emperor, tried to replace him with his own favoured candidate, Benedict III was restored to the papacy by a popular uprising. He reigned as bishop of Rome until his death in April 858.

    Louis II of Italy

  2. Treaty

    Treaty of Prüm

    The Treaty of Prüm was the arrangement of September 855 by which the dying Emperor Lothair I divided Middle Francia among his three sons at the abbey of Prüm in the Eifel.

ProfileState254 states with a known seat in 855 CEOpen the atlas at 855 CE →

In the profiles

Died in 855 CE 1

States founded 2

States that came to an end 1

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Cite this page
APA
The Epoch Institute. (2026). 855 CE. In The Epoch Institute, Year by Year. https://the-epoch-institute.org/years/855
MLA
“855 CE.” The Epoch Institute, Year by Year, The Epoch Institute, 2026, https://the-epoch-institute.org/years/855. Accessed .
Chicago
The Epoch Institute. “855 CE.” The Epoch Institute, Year by Year. 2026. https://the-epoch-institute.org/years/855.
Harvard
The Epoch Institute (2026) ‘855 CE’, The Epoch Institute, Year by Year. Available at: https://the-epoch-institute.org/years/855 (Accessed: ).