Columbia subject headings:
Catholic Church. Curia Romana--Congresses.
Letters, Papal--Congresses.
Papal documents--Congresses.
Harvard subject headings:
Catholic Church. Curia Romana--Congresses.
Church history--Middle Ages, 600-1500--Congresses.
Letters, Papal--History--Congresses.
Papacy--History--Congresses.
Princeton subject headings:
Catholic Church. Curia Romana--Congresses.
Church history--Middle Ages, 600-1500--Congresses.
Letters, Papal--History--Congresses.
Papacy--History--Congresses.