Columbia subject headings:
End of the world--History of doctrines.
Salvation--Christianity--History of doctrines.
Harvard subject headings:
Church renewal--Catholic Church--History--To 1500.
Eschatology--History of doctrines--Early church, ca. 30-600.
Eschatology--History of doctrines--Middle Ages, 600-1500.
Salvation--Christianity--History of doctrines--Middle Ages, 600-1500
Salvation--History of doctrines--Middle Ages, 600-1500.
Princeton subject headings:
Church renewal--Catholic Church--History--To 1500.
Eschatology--History of doctrines--Early church, ca. 30-600.
Eschatology--History of doctrines--Middle Ages, 600-1500.
Salvation--History of doctrines--Middle Ages, 600-1500.