Person

Sergius I of Naples

d. 864 · 9th century

Sergius I (d. 864) was Duke of Naples from 840 and founder of a hereditary dynasty that ruled the duchy for three centuries. Elected by the citizens, he allied with neighbouring powers against Saracen raiders, and a Neapolitan fleet under his son Caesarius fought at the naval Battle of Ostia in 849. Under his descendants Naples grew increasingly independent of Byzantium.

Mentioned in 1 state history

Duchy of Naples

See also

Cite this entry
APA
The Epoch Institute. (2026). Sergius I of Naples. In The Epoch Institute Encyclopedia. https://the-epoch-institute.org/encyclopedia/sergius-i-of-naples
MLA
“Sergius I of Naples.” The Epoch Institute Encyclopedia, The Epoch Institute, 2026, https://the-epoch-institute.org/encyclopedia/sergius-i-of-naples. Accessed .
Chicago
The Epoch Institute. “Sergius I of Naples.” The Epoch Institute Encyclopedia. 2026. https://the-epoch-institute.org/encyclopedia/sergius-i-of-naples.
Harvard
The Epoch Institute (2026) ‘Sergius I of Naples’, The Epoch Institute Encyclopedia. Available at: https://the-epoch-institute.org/encyclopedia/sergius-i-of-naples (Accessed: ).

Last reviewed October 2026Random entry ↻