Philadelphia--Built Environment--Images 8 Architecture--Philadelphia--19th century 1 Built Enviroment--Philadelphia--19th century 1 Built Environment--Philadelphia--18th century 1 Built environment--Pennsylvania--Philadelphia--20th century 1 Commerce--Philadelphia--19th century 1 Delaware River--Views 1 more ... Graphics, prints--Reproductions 1 Internal Improvements--18th century 1 Internal Improvements--19th century 1 Lantern Slides 1 Philadelphia Views--18th century 1 Philadelphia Views--19th century 1 Philadelphia Views--20th century 1 Philadelphia Views--Late 19th and Early 20th centuries 1 Philadelphia Views--Late 19th century 1 Philadelphia--Streets--Arch St 1 Philadelphia--Streets--Chestnut St 1 Philadelphia--Streets--Dock St 1 Philadelphia--Streets--Market St 1 Philadelphia--Streets--Pine St 1 Philadelphia--Streets--S. Front St 1 Photography--Philadelphia--Late 19th and Early 20th centuries 1 Portraits 1 Residences--Main Line (PA)--20th century 1 Slums--Pennsylvania--Philadelphia 1 Transportation--Images 1 Women's History--Service organizations 1 less ...