Florentius of Constantinople was the rival Anomoean archbishop of Constantinople (c. 363-?), holding the office at the same time as and in opposition to Eudoxius of Antioch. The Anomoeans were a 4th century Christian sect that upheld an extreme form of Arianism, that Jesus Christ was not of the same nature (consubstantial) as God the Father nor was of like nature (homoiousian), as maintained by the semi-Arians. When many of the congregation of Eudoxius of Antioch turned against him in Constantinople and as the members of other sects similarly left their own congregations, Aëtius of Antioch and Eunomius of Cyzicus, acting on behalf of the new emperor Jovian, used their offices in the interests of Arianism by creating other bishops of that party, including , (Anomoean) bishop of Constantinop