Columbia subject headings:
Harvard subject headings:
Christianity and culture--History--Congresses.
Europe--Church history--Congresses.
Europe--Relations--Russia--History--Congresses.
Orthodox Eastern Church--Congresses.
Orthodox Eastern Church--History--Congresses.
Russia--Relations--Europe--Congresses.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ zagranit︠s︡eĭ--Congresses.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--History--Congresses.
Princeton subject headings:
Christianity and culture--History--Congresses.
Christianity--Europe--History--Congresses.
Europe--Relations--Russia--History--Congresses.
Orthodox Eastern Church--History--Congresses.
Russia--Relations--Europe--History--Congresses.
Russkai︠a︡ pravoslavnai︠a︡ t︠s︡erkovʹ--History--Congresses.