Euthymius I Synkellos was the Ecumenical Patriarch of Constantinople from 907 to 912. He came to the office after Emperor Leo VI

Leo VI the Wise

Leo VI, surnamed the Wise or the Philosopher , was Byzantine emperor from 886 to 912. The second ruler of the Macedonian dynasty , he was very well-read, leading to his surname...

 forced Nicholas I Mystikos to resign over Nicholas' refusal to sanction the Emperor's fourth marriage.

The Vita Euthymii, or The Life of Euthymius, along with the correspondence of patriarch Nicholas and the writings of Arethas of Caesarea

Arethas of Caesarea

Arethas of Caesarea became Archbishop of Caesarea early in the 10th century, and is reckoned one of the most scholarly theologians of the Greek Orthodox Church.-Life:He was born at Patrae . He was a disciple of Photius...

, is one of the main historical sources for the period.
Euthymius I Synkellos (Greek

Greek language

Greek is an independent branch of the Indo-European family of languages. Native to the southern Balkans, it has the longest documented history of any Indo-European language, spanning 34 centuries of written records. Its writing system has been the Greek alphabet for the majority of its history;...

: Πατριάρχης Ευθύμιος Α΄) was the Ecumenical Patriarch of Constantinople from 907 to 912. He came to the office after Emperor Leo VI

Leo VI the Wise

Leo VI, surnamed the Wise or the Philosopher , was Byzantine emperor from 886 to 912. The second ruler of the Macedonian dynasty , he was very well-read, leading to his surname...

 forced Nicholas I Mystikos to resign over Nicholas' refusal to sanction the Emperor's fourth marriage.

The Vita Euthymii, or The Life of Euthymius, along with the correspondence of patriarch Nicholas and the writings of Arethas of Caesarea

Arethas of Caesarea

Arethas of Caesarea became Archbishop of Caesarea early in the 10th century, and is reckoned one of the most scholarly theologians of the Greek Orthodox Church.-Life:He was born at Patrae . He was a disciple of Photius...

, is one of the main historical sources for the period.
Euthymius I Synkellos (Greek

Greek language

Greek is an independent branch of the Indo-European family of languages. Native to the southern Balkans, it has the longest documented history of any Indo-European language, spanning 34 centuries of written records. Its writing system has been the Greek alphabet for the majority of its history;...

: Πατριάρχης Ευθύμιος Α΄) was the Ecumenical Patriarch of Constantinople from 907 to 912. He came to the office after Emperor Leo VI

Leo VI the Wise

Leo VI, surnamed the Wise or the Philosopher , was Byzantine emperor from 886 to 912. The second ruler of the Macedonian dynasty , he was very well-read, leading to his surname...

 forced Nicholas I Mystikos to resign over Nicholas' refusal to sanction the Emperor's fourth marriage.

The Vita Euthymii, or The Life of Euthymius, along with the correspondence of patriarch Nicholas and the writings of Arethas of Caesarea

Arethas of Caesarea

Arethas of Caesarea became Archbishop of Caesarea early in the 10th century, and is reckoned one of the most scholarly theologians of the Greek Orthodox Church.-Life:He was born at Patrae . He was a disciple of Photius...

, is one of the main historical sources for the period.