Columbia subject headings:
Nicholas, of Tolentino, Saint, 1245-1305--Congresses.
Purgatory in art--Congresses.
Purgatory--History of doctrines--Congresses.
Harvard subject headings:
Nicholas, of Tolentino, Saint, 1245-1305--Congresses.
Purgatory in art--Congresses.
Purgatory--History of doctrines--Congresses.
Princeton subject headings:
Nicholas, of Tolentino, Saint, 1245-1305--Congresses.
Purgatory in art--Congresses.
Purgatory--History of doctrines--Congresses.