Columbia subject headings:
Harvard subject headings:
Christian literature--History and criticism--Congresses.
Literature--History and criticism--Congresses.
Papal documents--History--Congresses.
Political poetry--History and criticism--Congresses.
Politics and literature--History--Congresses.
Popes in literature--History--Congresses.
Princeton subject headings:
Christian literature--History and criticism--Congresses.
Literature--History and criticism--Congresses.
Papal documents--History--Congresses.
Political poetry--History and criticism--Congresses.
Politics and literature--History--Congresses.
Popes in literature--History--Congresses.