Flavius Florentius (Greek: Φλωρέντιος;fl. 422-451) was a prominent high official of theEastern Roman Empire, who influenced imperial policy during the second quarter of the fifth century.

ASyrian, on 6 November 422 he waspraefectus urbi ofConstantinople, in which capacity he received an edict preserved in theCodex Theodosianus (vi.8.1).

After holding another high administrative post, perhaps aspraetorian prefect of Illyricum, from 21 April 428 to 11 February 430, Florentius held the second office of the Empire, thepraetorian prefecture of the East. He received further the honour of theconsulate in 429. On 31 January 438 and 26 November 439, Florentius was again prefect for the East. Due to the closure of the brothels of Constantinople, the treasury received less revenue, and Florentius decided to give some of his own properties to the State to compensate for the loss.

In the mid-440s, he was praetorian prefect twice again, presumably for the East.^[1] Between 444 and 448 he received the title ofpatricius; on 22 November of the year in which he received this title, he was commissioned byTheodosius II to participate in an investigation that was held in Constantinople on the views ofEutyches, as the Emperor trusted Florentius' orthodoxy.

In 451 he attended theCouncil of Chalcedon, during which he was present at the first, third, fourth and sixth sessions.

At the beginning of the reign ofMarcian, Florentius andAnatolius dissuaded the emperor from supporting the uprising of the Armenians against theSassanids. Marcian sent him to the Persian king to reassure him that Rome's intention was not to intervene.

• Jones, Arnold Hugh Martin, John Robert Martindale,John Morris,The Prosopography of the Later Roman Empire, "Florentius 7", volume 2, Cambridge University Press, 1992,ISBN 0-521-20159-4, pp. 478–480.

• 5th-century Byzantine people
• 5th-century eastern Roman consuls
• Praetorian prefects of the East
• Praetorian prefects of the Illyricum
• Patricii
• Urban prefects of Constantinople