Columbia subject headings:
Architecture, Domestic--Balkan Peninsula.
Architecture, Roman--Balkan Peninsula.
Harvard subject headings:
Architecture, Domestic--Balkan Peninsula.
Architecture, Roman--Balkan Peninsula.
Balkan Peninsula--Antiquities, Roman.
Balkan Peninsula--Antiquities.
Princeton subject headings:
Architecture, Domestic--Balkan Peninsula.
Architecture, Roman--Balkan Peninsula.