Constantine I (? – 9 August 677) was the
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 the ...
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
Theodore I of Constantinople.
References
7th-century patriarchs of Constantinople
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