Columbia subject headings:
Portugal--Antiquities, Roman--Congresses.
Romans--Portugal--Congresses.
Romans--Spain--Congresses.
Sculpture, Roman--Portugal--Congresses.
Sculpture, Roman--Spain--Congresses.
Spain--Antiquities, Roman--Congresses.
Harvard subject headings:
Portugal--Antiquities, Roman--Congresses.
Romans--Portugal--Congresses.
Romans--Spain--Congresses
Sculpture, Roman--Portugal--Congresses.
Sculpture, Roman--Spain--Congresses.
Spain--Antiquities, Roman--Congresses.
Princeton subject headings:
Portugal--Antiquities, Roman--Congresses.
Romans--Portugal--Congresses.
Romans--Spain--Congresses.
Sculpture, Roman--Portugal--Congresses.
Sculpture, Roman--Spain--Congresses.
Spain--Antiquities, Roman--Congresses.