Columbia subject headings:
Catherine, of Siena, Saint, 1347-1380.
Christian saints--Italy--Correspondence.
Harvard subject headings:
Catherine, of Siena, Saint, 1347-1380.
Christian saints--Italy--Correspondence.
Princeton subject headings:
Catherine, of Siena, Saint, 1347-1380.
Christian saints--Italy--Correspondence.
Spiritual life--Catholic Church.