Columbia subject headings:
Aragon (Spain)--History--Congresses.
Christians--Spain--Aragon--History--Congresses.
Fortification--Spain--Aragon--History--Congresses.
Muslims--Spain--Aragon--History--Congresses.
Harvard subject headings:
Andalusia (Spain)--Antiquities--Congresses.
Andalusia (Spain)--History--Congresses.
Islamic antiquities--Spain--Andalusia--Congresses.
Spain--Civilization--711-1516--Congresses.
Spain--Civilization--Islamic influences--Congresses.
Princeton subject headings:
Andalusia (Spain)--Antiquities--Congresses.
Andalusia (Spain)--Boundaries--Congresses.
Andalusia (Spain)--History--Congresses.
Islamic antiquities--Spain--Andalusia--Congresses.
Spain--Civilization--711-1516--Congresses.
Spain--Civilization--Islamic influences--Congresses.