Columbia subject headings:
Aragon (Spain)--History--Congresses.
Mediterranean Region--Civilization--Congresses.
Sicilian Vespers, Italy, 1282--Congresses.
Harvard subject headings:
Aragon (Spain)--History--Congresses.
Aragon (Spain)--History--Peter III, 1276-1285--Congresses.
Mediterranean Region--Civilization--Congresses.
Sicilian Vespers, Italy, 1282--Congresses.
Princeton subject headings:
Aragon (Spain)--History--Peter III, 1276-1285--Congresses.
Sicilian Vespers, Italy, 1282--History--Congresses.
Sicily (Italy)--History--1282-1409--Congresses.