Centennial Exhibition (1876 : Philadelphia, Pa.) 1 Civil rights movements 1 Discrimination in housing 1 Housing development--United States 1 Hydrographic surveying--Mississippi River 1 Newspapers--Pennsylvania--Philadelphia 1 Newspapers--Pennsylvania--Philadelphia--20th century 1 more ... Philadelphia (Pa.)--Newspapers 1 Philadelphia Views--19th century 1 Philadelphia Views--20th century 1 Photographs--Street scenes 1 Portraits, American 1 Portraits, European 1 Portraits--1700-1900 1 Portraits--American--18th Century 1 Portraits--American--19th Century 1 Portraits--Colonial 1 Portraits--European--18th Century 1 Portraits--European--19th Century 1 Portraits--French subjects 1 Portraits--Women--18th century 1 Portraits--Women--19th century 1 Portraiture--18th century 1 Portraiture--19th century 1 Race discrimination 1 Segregation 1 Seminole War, 2nd, 1835-1842 1 Shipping--Pennsylvania--Philadelphia 1 Shipping--Pennsylvania--Philadelphia--19th Century 1 Slavery 1 Spouses--Correspondence--19th century 1 United States--History--Civil War, 1861-1865 1 United States. Army of the Potomac 1 United States. Army. Corps of Engineers 1 United States. Army. Corps of Engineers--History--19th century 1 West Indies--Commerce 1 less ...