Columbia subject headings:
Monastic and religious life--History--Early church, ca. 30-600.
Monastic and religious life.
Spiritual life--Catholic Church.
Harvard subject headings:
Monastic and religious life--History--Congresses.
Spiritual life--Catholic Church--History--Congresses.
Princeton subject headings:
Monastic and religious life--History--Congresses.
Spiritual life--Catholic Church--History--Congresses.