Theodore I (? – 28 January 687) was the

Ecumenical Patriarch of Constantinople The ecumenical patriarch ( el, Οἰκουμενικός Πατριάρχης, translit=Oikoumenikós Patriárchēs) is the archbishop of Constantinople ( Istanbul), New Rome and '' primus inter pares'' (first among equals) among the heads of ...

from 677 to 679. He had been preceded by

Constantine I of Constantinople Constantine I (? – 9 August 677) was the patriarch of Constantinople from 675 to 677. He is listed as a saint, feast day July 29, on Wikipedia Eastern Orthodox Litúrgics. He was preceded by John V of Constantinople. He was succeeded by Theodo ...

. During this cataclysmic period, the Byzantine military overcame the Arab incursion against its walls in the Arab

siege of Constantinople (674-678) The following is a list of sieges of Constantinople, a historic city located in an area which is today part of Istanbul, Turkey. The city was built on the land that links Europe to Asia through Bosporus and connects the Sea of Marmara and the Bl ...

. He was succeeded by Patriarch

George I of Constantinople George I (? – January or February 686) was the Ecumenical Patriarch of Constantinople from 679 to 686. He was succeeded, after a one-year bishopric and interlude of a reign by patriarch Theodore I of Constantinople Theodore I (? – 28 Ja ...

References

7th-century patriarchs of Constantinople {{EasternOrthodoxy-bishop-stub