His titular position is Patriarch of the Orthodox Church of Constantinople, one of the sixteen autocephalous Churches, and he is one of the original four Eastern Orthodoxpatriarchs.
Within RomanCatholic administration, it was not until the RomanCatholic Fourth Lateran Council in 1215 that the Latin Patriarch of Constantinople was recognized as having such status; in 1439 the Council of Florence (not recognized by the Orthodox Church as ecumenical) gave it to the Greek patriarch.