Architectural Plans--Philadelphia--20th century 6 Architecture--19th century 6 Architecture--20th Century 6 Centennial Exhibition (1876 : Philadelphia, Pa.) 6 Genealogy 6 Architecture--Philadelphia--19th century 4 Architectural elements--Pennsylvania--Philadelphia 3 more ... Architecture -- 19th Century 3 Architecture--Philadelphia--20th Century 3 Built environment--Pennsylvania--Philadelphia--20th century 3 Pennsylvania--History--Colonial period, ca. 1600-1775 3 Philadelphia Views--19th century 3 Portraits--American--19th Century 3 United States--History--Revolution, 1775-1783 3 Academy of Music (Philadelphia, Pa.) 2 Affirmative action programs--Government policy--United States--History--20th century 2 Architects--Pennsylvania 2 Architectural Plans 2 Architecture--18th century 2 Architecture--Germantown (Pa)--19th century 2 Architecture--Pennsylvania--Philadelphia--History 2 Architecture--Residential--19th century 2 Artists--Pennsylvania--Philadelphia--20th century 2 Built Enviroment--Philadelphia--19th century 2 Burial records 2 Business--History--Pennsylvania--Philadelphia--20th century 2 Cemeteries–-Pennsylvania 2 Charitable Organizations--Philadelphia 2 City planning--Pennsylvania--Philadelphia--20th century 2 Demolished Buildings--Pennsylvania--Philadelphia--20th century 2 Engineering--Pennsylvania--Philadelphia 2 Fairmount Park (Philadelphia, Pa) 2 Family life--Personal correspondence--19th century 2 Genealogical correspondence 2 Genealogy & local history 2 Genealogy--Family trees 2 Historic buildings--Pennsylvania--Philadelphia 2 Historic house museums--Furniture, equipment, etc 2 Historic house museums--Interpretive programs 2 Insurance Surveys--Philadelphia--19th century 2 less ...