Columbia subject headings:
Europe--History--476-1492--Congresses.
Naples (Kingdom)--History--1016-1268--Congresses.
Normans--Italy, Southern--Congresses.
Harvard subject headings:
Europe--History--476-1492--Congresses.
Naples (Kingdom)--History--1016-1268--Congresses.
Normans--Italy, Southern--Congresses.
Princeton subject headings:
Europe--History--476-1492--Congresses.
Naples (Kingdom)--History--1016-1268--Congresses.
Normans--Italy, Southers--Congresses.