Columbia subject headings:
Islam.
Istanbul (Turkey)--Description and travel.
Marmara, Sea of (Turkey)
Orthodox Eastern Church.
Harvard subject headings:
Islam--Turkey--Istanbul--Early works to 1800.
Istanbul (Turkey)--Description and travel--Early works to 1800.
Marmara, Sea of (Turkey)--Description and travel--Early works to 1800.
Orthodox Eastern Church--Turkey--Istanbul--Early works to 1800.
Princeton subject headings: