Columbia subject headings:
Theology, Doctrinal--History--Early church, ca. 30-600--Congresses.
Theology, Doctrinal--History--Middle Ages, 600-1500--Congresses.
Harvard subject headings:
Theology, Doctrinal--History--Early church, ca. 30-600--Congresses.
Theology, Doctrinal--History--Middle Ages, 600-1500--Congresses.
Princeton subject headings:
Theology, Doctrinal--History--Early church, ca. 30-600--Congresses.
Theology, Doctrinal--History--Middle Ages, 600-1500--Congresses.