Columbia subject headings:
Europe--Foreign relations.
Europe--History--476-1492.
Mediation--Europe--History.
Reconciliation--History.
Harvard subject headings:
Europe--Foreign relations--History.
Europe--History--476-1492.
Mediation--Europe--History.
Reconciliation--History.
Princeton subject headings:
Europe--Foreign relations--History.
Europe--History--476-1492.
Mediation--Europe--History.
Reconciliation--History.