Gerasimus I of Constantinople

{{Short description|Ecumenical Patriarch of Constantinople from 1320 to 1321}}

{{Use dmy dates|date=January 2025}}

{{Infobox Christian leader

| name = Gerasimus I of Constantinople

| image =

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| church = Church of Constantinople

| archbishop_of = Ecumenical Patriarch of Constantinople

| term = 21 March 1320 - 20 April 1321

| predecessor = John XIII of Constantinople

| successor = Isaias of Constantinople

| birth_name =

| birth_date =

| birth_place = Philadelphia

| death_date = 20 April 1321

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| buried =

| religion = Eastern Orthodoxy

}}

Gerasimus I of Constantinople ({{langx|el|Γεράσιμος|Gerasimos}}; died 20 April 1321)[https://sourcebooks.fordham.edu/byzantium/texts/byzpatcp.asp Fordham University website, Byzantium Texts page] was the Ecumenical Patriarch of Constantinople from 1320 to 1321.[https://www.apostolicpilgrimage.org/list-of-ecumenical-patriarchs.html Apostolic Pilgrimage website, List of Patriarchs]

He was born in Philadelphia and became abbot of the prestigious Mangana Monastery in Constantinople. He was elected as patriarch at an advanced age and died on 20 April 1321.

He became Patriarch during the reign of Emperor Andronikos II Palaiologos; the Emperor found him to be "docile".[https://books.google.com/books?id=5nvd6eQYSr8C&dq=gerasimos+i+constantinople+1321&pg=PA474 Google Books website], History of the Byzantine and Greek Empires from MLVII to MCCCCLIII, Volume 1 by George Finlay, page 474.