Sergius was the son of Gregory III but his mother is unknown. The date and place of his birth have not been found.
He died in 0878. The place is not known.
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Sergius II |
Gregory III |
Sergius I |
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| Event | Date | Details | Source | Multimedia | Notes |
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| Death | 0878 |
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| Attribute | Date | Description | Details | Source | Multimedia | Notes |
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| Nobility Title | 0866 | prefect of Amalfi | ||||
| Nobility Title | FROM 0870 TO 0877 | duke of Naples |
Note 1
It is written that Sergius made Naples "into another Palermo, another Africa," by his friendly relations with the Aghlabids.[1] For this, he earned the excommunication of Pope John VIII. He also earned the opposition of his brothers, Bishop Athansius I and Caesar. He imprisoned the latter and the former was exiled to an island. Sergius was blinded and deposed by his brother Athanasius II, Bishop of Naples, who sent him to Rome. His son Gregory IV eventually succeeded to the ducal throne.