[Alex Murphy]

Patriarch Bartholomew revealed that he and the Roman Pontiff had “agreed to leave as a legacy to ourselves and our successors a gathering in Nicaea in 2025, to celebrate together, after 17 centuries, the first truly ecumenical synod, where the Creed was first promulgated.” The Council of Nicea, held in 325, brought together over 300 bishops and approved the formula of faith now known as the Nicene Creed.

A leading official of the Russian Orthodox Church said that Ecumenical Patriarch Bartholomew I represented only his own Patriarchate of Constantinople, and not the world’s other Orthodox churches, in his meeting with Pope Francis, according to a report from the Religious Information Service of Ukraine.

Metropolitan Hilarion, the chairman of the Russian Orthodox Church’s Department of External Church Relations, said that the Ecumenical Patriarch had not consulted with the leaders of other Orthodox churches before meeting with the Pope, according to the report. The Ecumenical Patriarch holds a primacy of honor among the Orthodox churches, the largest of which is the Russian Orthodox Church.
-- from the related thread Russian Orthodox Church distances itself from Ecumenical Patriarch’s meeting with Pope

[Campion]

Historically, the person in the East who called councils was the Byzantine Emperor, not the Patriarch. With no Emperor since 1453 ... ??

And the Russians are correct that the EP is not their ecclesial superior.

[Gamecock]

Metropolitan Hilarion, the chairman of the Russian Orthodox Church’s Department of External Church Relations, said that the Ecumenical Patriarch had not consulted with the leaders of other Orthodox churches before meeting with the Pope, according to the report.

I wonder what Metropolitan Alexander, of the Latvian Orthodox Church, thinks about this?