Columbia subject headings:
Harvard subject headings:
Architecture, Medieval--Greece--Euboea Island.
Castles--Greece--Euboea Island.
Euboea Island (Greece)--Antiquities.
Military architecture--Greece--Euboea Island--History.
Princeton subject headings:
Architecture, Medieval--Greece--Euboea Island.
Castles--Greece--Euboea Island.
Euboea Island (Greece)--History.
Military architecture--Greece--Euboea Island--History.