Columbia subject headings:
Commercial buildings--Pennsylvania--Philadelphia--Pictorial works.
Independence Hall (Philadelphia, Pa.)--Pictorial works.
Philadelphia (Pa.)--Pictorial works.
Public buildings--Pennsylvania--Philadelphia--Pictorial works.
Streetscapes (Urban design)--Pennsylvania--Philadelphia--Pictorial works.
University of Pennsylvania--Pictorial works.
Harvard subject headings:
Philadelphia (Pa.)--Guidebooks.
Princeton subject headings: