Anonymus 589 was the eparch of Constantinople (ἔπαρχος τῆς Πόλεως -- "of the Polis") and was one of the high dignitaries who met the emperor Theophilos 5 at Hieria when the emperor returned victorious from his campaign in Cilicia against the Saracens; the others included the augousta (Theodora 2), the emperor's representative (Anonymus 587) and the magistros (Anonymus 588): Const. Porph., Military Treatises, C 812-824 (Reiske 503-504). When Theophilos 5 entered the Golden Gate, the eparch of the City (i.e. Constantinople) Anonymus 589, with Anonymus 587 and Anonymus 588, presented him with a bejewelled crown: Const. Porph., Military Treatises, C 846-849 (Reiske 503-506). The date is usually accepted as 831, see Haldon, Expeditions, p. 285, but see W. T. Treadgold, "The Chronological Accuracy of the Chronicle of Symeon the Logothete for the Years 813-845", in DOP 33 (1979), p. 178 for an alternative date in 837.

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