Gregory IV of Constantinople (Greek:Γρηγόριος; died after 1623) wasEcumenical Patriarch of Constantinople for two months in 1623.

Before he was elected as Patriarch of Constantinople, Gregory IV was Metropolitan ofAmasya. At the time of his election, he was old and blind in one eye, and so he was given the sobriquetStravoamaseias (Greek:Στραβοαμασείας), i.e.the blind of Amasya.^[1]

His short reign has to be considered in the context of the clash between the pro-Calvinist PatriarchCyril I of Constantinople, supported by the ProtestantDutch andEnglishambassadors to the Ottoman capital, and his opponents supported by the CatholicFrench,Austrian andRepublic of Venice ambassadors. The latter were successful at persuading theGrand vizier to depose Cyril I on 12 April 1623 and to appoint in his place Gregory IV, the head of the pro-Western faction.^[2]

Eugenia Kermeli reports, "In 1623, the metropolitan of Amaseia Gregory promised [the French ambassador] Cécy to appoint metropolitans friendly to Rome in case he was elected".^[3]

Gregory IV proved to be incompetent and could not pay the appointment fee (peshtesh) due to theOttoman Sultan.^[2] Further theMetropolitans and the bishops were unsatisfied with him because he had not been canonically elected by theHoly Synod. Thus, on 18 June 1623, the Holy Synod deposed Gregory IV and formally electedAnthimus II of Constantinople in his place.^[1]

After his deposition, Gregory IV was exiled to the island ofRhodes.^[4] The date of his death is not known.

• Frazee, Charles A. (2006) [1983].Catholics and Sultans - The Church and the Ottoman Empire 1453–1923. Cambridge:Cambridge University Press.ISBN 9780521027007.

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