15th–16th century Moscow–Constantinople schism
The schism between the Ecumenical Patriarchate and part of its Metropolis of Kiev and all Rus occurred between approximately 1467 and 1560. This schism de facto ended supposedly around 1560.
Isidore of Kiev
Ecumenical Patriarchate of Constantinople
The Ecumenical Patriarchate of Constantinople is one of the fifteen to seventeen autocephalous churches that together compose the Eastern Orthodox Church. It is headed by the Ecumenical Patriarch of Constantinople.
The Church of Hagia Irene, was the cathedral church of the Patriarchate before Hagia Sophia was completed in 360
Hagia Sophia was the patriarchal cathedral until 1453
The Hagia Sophia church in Nicaea
Patriarch Gennadios with Sultan Mehmed II