Silvanus (praetorian prefect)
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Silvanus was a praetorian prefect who protected Saloninus, the son of the emperor Gallienus. In 260 after an invasion of the Alamanni and Franks in which Postumus declared himself emperor, Silvanus had a dispute with the usurper Postumus. Postumus besieged and attacked Cologne, where Silvanus and Saloninus were residing, and killed both of them.