Pope Sergius III

Sergius III, succeeded Christopher[?] as pope in 904 and reigned till 911. His pontificate, so far as is known, was remarkable for nothing but the rise of the "pornocracy" of Theodora and her daughters. Sergius restored the Lateran palace, which had been shattered by an earthquake. After him, Anastasius[?] sat on the pontifical throne.

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from the 9th edition (1886) of an unnamed encyclopedia.

preceded by Pope Christopher[?] (903-904)

succeeded by Pope Anastasius III (911-913)