Columbia subject headings:
Mosques--Turkey.
Museums--Turkey.
Turkey--Buildings, structures, etc.
Harvard subject headings:
Architecture, Byzantine--Turkey--Istanbul
Ayasofya Müzesi.
Church decoration and ornament--Turkey--Istanbul.
Istanbul (Turkey)--Buildings, structures, etc.
Mosques--Turkey
Museums--Turkey.
Turkey--Buildings, structures, etc.
Princeton subject headings:
Mosques--Turkey.
Museums--Turkey.
Turkey--Buildings, structures, etc.