Title: Epistle of the Russian Holy Synod to the Patriarch of Constantinople, on the subject of reunion
Subjects: Relations, Orthodox Eastern Church, Catholic Church, Protestant churches, Correspondence, Bishops, Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ, Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ. Svi︠a︡ti︠e︡ĭshīĭ pravitelʹstvui︠u︡shchīĭ sinod, Constantinople (Ecumenical patriarchate)
Places: Soviet Union