John Zizioulas was a Greek Orthodox bishop who served as the Metropolitan of Pergamon of the Ecumenical Patriarchate of Constantinople from 1986 until his death in 2023. He was one of the most influential Orthodox Christian theologians of the 20th and 21st centuries.
Zizioulas in 2014
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