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