Columbia subject headings:
Harvard subject headings:
Civilization, Medieval--Congresses
Diplomatics--Italy--Naples (Kingdom)--Congresses.
Diplomatics--Italy--Sicily--Congresses.
Naples (Kingdom)--History--1016-1268--Congresses.
Normans--Italy--Naples (Kingdom)--Congresses.
Normans--Italy--Sicily--Congresses.
Sicily (Italy)--History--1016-1194--Congresses.
Sicily (Italy)--History--1194-1282--Congresses.
Swabians--Italy--Naples (Kingdom)--Congresses.
Swabians--Italy--Sicily--Congresses.
Princeton subject headings:
Books--Italy, Southern--History--Congresses.
Italy, Southern--Civilization--Congresses.
Manuscripts, Italian--History--Congresses.
Writing--Italy, Southern--History--Congresses.