Columbia subject headings:
Harvard subject headings:
Architecture--Conservation and restoration--Pennsylvania--Philadelphia.
Architecture--Pennsylvania--Philadelphia--Conservation and restoration.
Buildings--Pennsylvania--Philadelphia..
Historic buildings--Pennsylvania--Philadelphia
Philadelphia (Pa.)--Buildings, structures, etc.
Philadelphia (Pa.)--History.
Rittenhouse (Philadelphia, Pa.)--Buildings, structures, etc.
Princeton subject headings:
Architecture--Pennsylvania--Philadelphia--Conservation and restoration.
Buildings--Pennsylvania--Philadelphia.
Philadelphia (Pa.)--Buildings, structures, etc..
Philadelphia (Pa.)--History.
Rittenhouse (Philadelphia, Pa.)--Buildings, structures, etc..