Architecture--20th Century Advertising--Pennsylvania--Philadelphia--20th Century 1 Architectural Plans--Philadelphia--20th century 1 Architecture -- 19th Century 1 Building Trade--20th Century 1 City planning--Pennsylvania--Philadelphia--20th century 1 Clubs and Associations--Philadelphia 1 more ... Delaware River Bridge 1 Duke University--Architecture 1 Estates and Manors--20th century 1 Philadelphia views--Street scenes--20th century 1 Songs--Graphics 1 Street railroads--Pennsylvania 1 Suburban homes--Mainline 1 Wendell & Smith 1 World Fairs and Exhibitions 1 less ...