Columbia subject headings:
Architecture, Byzantine--Turkey--Istanbul.
Church architecture--Turkey--Istanbul.
Liturgy and architecture.
Harvard subject headings:
Architecture, Byzantine--Turkey--Istanbul
Church architecture--Turkey--Istanbul.
Istanbul (Turkey)--Buildings, structures, etc.
Liturgy and architecture--Turkey--Istanbul.
Princeton subject headings:
Architecture, Byzantine--Turkey--Istanbul.
Church architecture--Turkey--Istanbul.
Istanbul (Turkey)--Buildings, structures, etc.
Liturgy and architecture--Turkey--Istanbul.