Columbia subject headings:
Church and state--Russia.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--Bishops.
Harvard subject headings:
Church and state--Russia
Church and state--Russia--History
Church history--Middle Ages, 600-1500
Constantinople (Ecumenical patriarchate)--Relations--Russkai͡a pravoslavnai͡a t͡serkovʹ.
Russia--Church history.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--Bishops--History.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--Bishops.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--Relations--Constantinople (Ecumenical patriarchate)
Princeton subject headings:
Church and state--Russia (Federation)
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--Bishops.