Patriarch | Catholicos | Latin Patriarch of Jerusalem | patriarch | Catholicos of All Armenians | Greek Orthodox Patriarch of Jerusalem | Ecumenical Patriarch of Constantinople | Patriarch of Alexandria | Patriarch Nikon | Patriarch Germanus I of Constantinople | Patriarch Filaret | Patriarch Polyeuctus of Constantinople | Patriarch Evtimiy Square | Presiding Patriarch | Patriarch of Georgia | Patriarch of Antioch | Patriarch Manuel I of Constantinople | Patriarch Jeremias II of Constantinople | Patriarch Ignatius of Constantinople | Patriarch Heraclius of Jerusalem | Patriarch Germanus V of Constantinople | Latin Patriarch of Constantinople | Patriarch Raphael I of Constantinople | Patriarch Photios II of Constantinople | Patriarch Philaret of Moscow | Patriarch Peter VII of Alexandria | Patriarch Pavle of Serbia | Patriarch of Moscow and all Rus' | Patriarch Michael III of Constantinople | Patriarch Matthew II of Constantinople |
It was headed by the Catholicos (later, Catholicos Patriarch), officially styled as the Catholicos Patriarch of Imereti, Odishi, Ponto-Abkhaz-Guria, Racha-Lechkhum-Svaneti, Ossetians, Dvals, and all of the North.
Soon the Catholicos Patriarch Leonid died of cholera, and, on October 14, 1921, Ambrosius was elected as his successor.
The project was welcomed and blessed by the leaders of the three main religious confessions of Russia: Patriarch of Moscow and All Russia Kirill, Chief Rabbi Berel Lazar, Chairman of the Council of Muftis Mufti Shaikh Rawil Gaynetdin, Catholicos-Patriarch Ilia II of Georgia, Apostolic Nuncio Antonio Mennini, President of the Russian Association of Buddhists, the Karma Kagyu school Alexander Koibagarov.