Columbia subject headings:
Harvard subject headings:
Carpathian Mountains Region--Church history--Congresses.
Carpathian Mountains Region--Civilization--To 1600--Congresses.
Church history--16th century--Congresses.
Transylvania (Romania)--Church history--Congresses.
Transylvania (Romania)--Civilization--Congresses.
Princeton subject headings:
Europe, Central--Church history--To 1600--Congresses.
Pannonia Region--Church history--To 1600--Congresses.
Religion and sociology--Europe, Central--Congresses.
Religion and sociology--Pannonia Region--Congresses.