Columbia subject headings:
Architecture, Byzantine--Turkey--Istanbul.
Architecture, Ottoman--Turkey--Istanbul.
Ayasofya Müzesi.
Church architecture--Turkey--Istanbul.
Istanbul (Turkey)--Buildings, structures, etc.
Mosques--Turkey--Istanbul.
Harvard subject headings:
Architecture, Byzantine--Turkey--Istanbul
Architecture, Ottoman--Turkey--Istanbul
Ayasofya Müzesi.
Church architecture--Turkey--Istanbul.
Islamic architecture--Turkey--Istanbul.
Istanbul (Turkey)--Buildings, structures, etc.
Mosques--Turkey--Istanbul.
Princeton subject headings:
Architecture, Byzantine--Turkey--Istanbul.
Architecture, Ottoman--Turkey--Istanbul.
Ayasofya Müzesi.
Church architecture--Turkey--Istanbul.
Istanbul (Turkey)--Buildings, structures, etc.
Mosques--Turkey--Istanbul.