Columbia subject headings:
Architecture, Ancient--Mediterranean Region--Congresses.
Palaces--Mediterranean Region--Congresses.
Harvard subject headings:
Architecture, Celtic--Congresses.
History, Ancient--Congresses
Manners and customs--Congresses.
Palaces--Congresses.
Power (Philosophy)--Congresses.
Power (Social sciences)--History--To 500--Congresses.
Sovereignty--History--Congresses.
Princeton subject headings:
Architecture, Ancient--Mediterranean Region--Congresses.
Palaces--Mediterranean Region--Congresses.