Columbia subject headings:
Harvard subject headings:
Fortification--Aegean Islands (Greece and Turkey)--History.
Fortification--Greece--Rhodes--History.
Greece--History.
Knights of Malta--Aegean Islands (Greece and Turkey)--History.
Knights of Malta--Greece--Rhodes--History.
Mediterranean Region--History, Military.
Rhodes (Greece : Island)--History--Siege, 1522
Rhodes (Greece)--History--Siege, 1480.
Princeton subject headings:
Architecture, Medieval--Greece--Dodecanese Islands.
Fortification--Greece--Dodecanese Islands.
Fortification--Greece--Rhodes.
Greece--History--323-1453.
Knights of Malta--Greece--Buildings.
Military religious orders--Greece--History.