Peter (? – October 666) 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 654 to 666. He was condemned as a heretic in the

Third Council of Constantinople The Third Council of Constantinople, counted as the Sixth Ecumenical Council by the Eastern Orthodox and Catholic Churches, as well by certain other Western Churches, met in 680–681 and condemned monoenergism and monothelitism as heretical ...

. He was succeeded as ecumenical patriarch by Thomas II of Constantinople. Peter succeeded Patr. Pyrrhus who also was a Monothelite. In correspondence with

Pope Vitalian Pope Vitalian ( la, Vitalianus; died 27 January 672) was the bishop of Rome from 30 July 657 to his death. His pontificate was marked by the dispute between the papacy and the imperial government in Constantinople over Monothelitism, which Rome ...

of Rome following Vitalian's ascension to the see of Rome, Peter was noncommittal concerning Monothelitism, leading to a restoration of ecclesiastical intercourse between Rome and Constantinople. This resulted the addition of Vitalian's name on the diptychs of the church in Constantinople—the only name of a pope so entered between the reign of

Pope Honorius I Pope Honorius I (died 12 October 638) was the bishop of Rome from 27 October 625 to his death. He was active in spreading Christianity among Anglo-Saxons and attempted to convince the Celts to calculate Easter in the Roman fashion. He is chief ...

, who died in 638, and 677 when Patriarch Theodore I removed the pope's name prior to the

Sixth Ecumenical Council The Third Council of Constantinople, counted as the Sixth Ecumenical Council by the Eastern Orthodox and Catholic Churches, as well by certain other Western Churches, met in 680–681 and condemned monoenergism and monothelitism as heretical ...

. At the council Peter was condemned as a heretic along with Patriarchs Sergius I, Pyrrhus I and Paul II all of Constantinople, Patriarch

Cyrus of Alexandria Cyrus of Alexandria ( ar, المقوقس ''al-Muqawqis'', el, Κῦρος Ἀλεξανδρείας) was a Melchite patriarch of the see of Alexandria in the 7th century, one of the originators of monothelitism and the last Byzantine prefect of ...

, and Theodore of Pharan.

References

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