Thomas I of Constantinople (Greek: Θωμᾶς; died 21 March 610) was the Ecumenical Patriarch of Constantinople from 607 to 610. He has been canonised a saint in the Eastern Orthodox Church. His feast day is 21 March for those churches which follow the Julian Calendar, 21 March falls on 3 April of the modern Gregorian Calendar).

Notes and references

Titles of Chalcedonian Christianity
Preceded by Ecumenical Patriarch of Constantinople
607 – 610
Succeeded by
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