Columbia subject headings:
Istanbul (Turkey)--Buildings, structures, etc.
Istanbul (Turkey)--Description and travel.
Istanbul (Turkey)--History.
Harvard subject headings:
Istanbul (Turkey)--Buildings, structures, etc.
Istanbul (Turkey)--Description and travel.
Istanbul (Turkey)--Guidebooks.
Istanbul (Turkey)--History.
Monuments--Turkey--Istanbul.
Princeton subject headings:
Istanbul (Turkey)--Buildings, structures, etc.
Istanbul (Turkey)--Description and travel.
Istanbul (Turkey)--History.