Euphrosyne (9th century)

Amorian or Phrygian dynasty
Chronology
Michael II		820–829
with Theophilos as co-emperor, 822–829
Theophilos		829–842
with Constantine (c. 833–835) and Michael III (840–842) as co-emperors
Michael III		842–867
under Theodora and Theoktistos as regents, 842–855, and with Basil I the Macedonian as co-emperor 866–867
Succession
Preceded by Leo V and the Nikephorian dynasty		Followed by Macedonian dynasty

Euphrosyne (Greek: Εὐφροσύνη; c. 790 – after 836), was a Byzantine Empress consort by marriage to Michael II. She was a daughter of Byzantine emperor Constantine VI, the last representative of the Isaurian dynasty, and his empress Maria of Amnia.

In January, 795, Constantine divorced Maria and sent her along with Euphrosyne and her sister Irene to a convent in the island of Prinkipo. The Emperor then proceeded to marry his mistress Theodote.

Euphrosyne spent her life in the monastery until c. 823. Michael II had risen to the throne three years before but his dynastic claims were at best shaky. His first wife Thekla died early in the reign and he decided to strengthen his claim by marrying Euphrosyne.

She was thus taken from her convent and entered the court as the new Empress consort, but the highly controversial marriage proved barren. Michael II died on 2 October 829 and was succeeded by Theophilos, his son with Tekla.

As his stepmother, Euphrosyne was still able to take some decisions for the sixteen-year-old emperor. She proclaimed a bride-show for him and seem to have handpicked her daughter-in-law Theodora. Soon after she retired to a monastery again. Theophanes Continuatus, in the continuation of the chronicle started by Theophanes the Confessor, indicates that Theophilos obligated her to hold on to her monastic vows, ending the religious controversy concerning her presence in court.

Theodora would go on to restore the veneration of icons in the Empire, forbidden since 815, when Leo V the Armenian restarted the Byzantine Iconoclasm. Whether Euphrosyne shared her Iconodule tendencies and picked her for it remains vague.

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