Columbia subject headings:
Architecture, Byzantine--Turkey--Trabzon.
Architecture--Turkey--Trabzon.
Islamic architecture--Turkey--Trabzon.
Harvard subject headings:
Architecture, Byzantine--Turkey--Trabzon.
Architecture--Turkey--Trabzon.
Islamic architecture--Turkey--Trabzon.
Sumela (Monastery : Trabzon, Turkey)--Description and travel.
Trabzon (Turkey)--Description and travel.
Princeton subject headings: