Columbia subject headings:
Cities and towns, Medieval--Byzantine Empire--History.
Istanbul (Turkey)--Buildings, structures, etc.
Istanbul (Turkey)--History--To 1453.
Harvard subject headings:
Cities and towns, Medieval
Cities and towns--Byzantine Empire.
City planning--Byzantine Empire.
Istanbul (Turkey)--History--To 1453.
Princeton subject headings:
Cities and towns, Medieval--Byzantine Empire--History.
Istanbul (Turkey)--Buildings, structures, etc.
Istanbul (Turkey)--History--To 1453.