Columbia subject headings:
Catholic Church--Doctrines--History.
Justification (Christian theology)--History of doctrines.
Penance--History.
Reconciliation--Religious aspects--Catholic Church--History of doctrines.
Reconciliation--Religious aspects--Christianity--History of doctrines.
Harvard subject headings:
Catholic Church--Doctrines--History.
Justification (Christian theology)--History of doctrines.
Penance--History
Reconciliation--Religious aspects--Catholic Church--History of doctrines.
Reconciliation--Religious aspects--Christianity--History of doctrines.
Princeton subject headings: