Columbia subject headings:
Architecture--Jordan--Petra (Extinct city)
Jordan--Antiquities.
Petra (Extinct city)
Harvard subject headings:
Architecture--Expertising--Jordan--Petra (Extinct city).
Jordan--Antiquities.
Petra (Extinct city)--Buildings, structures, etc.
Princeton subject headings:
Architecture--Jordan--Petra (Extinct city).
Jordan--Antiquities.
Petra (Extinct city)