


Between 18, Philadelphia's population doubled to 2.07 million. In the 20th century, Puerto Rican Americans moved to the city in large numbers. Following the end of the Civil War in 1865, Philadelphia became a leading destination for African Americans in the Great Migration. In the 20th century, immigrant waves from Italy and elsewhere in Southern Europe arrived. The city’s blossoming industrial sector attracted European immigrants, predominantly from Germany and Ireland, the two largest reported ancestry groups in the city as of 2015. was under construction.ĭuring the 19th and 20th centuries, Philadelphia emerged as a major national industrial center and railroad hub. Philadelphia remained the nation's largest city until 1790, when it was surpassed by New York City, and served as the nation's first capital from May 10, 1775, until December 12, 1776, and on four subsequent occasions during and following the American Revolution, including from 1790 to 1800 while the new national capital of Washington, D.C.

Constitution was later ratified in Philadelphia at the Philadelphia Convention of 1787. Once the Revolutionary War commenced, both the Battle of Germantown and the Siege of Fort Mifflin were fought within Philadelphia's city limits. Philadelphia hosted the First Continental Congress in 1774 following the Boston Tea Party, preserved the Liberty Bell, and hosted the Second Continental Congress during which the founders signed the Declaration of Independence, which historian Joseph Ellis has described as "the most potent and consequential words in American history". The city served as capital of the Pennsylvania Colony during the British colonial era and went on to play a historic and vital role as the central meeting place for the nation's founding fathers whose plans and actions in Philadelphia ultimately inspired the American Revolution and the nation's independence. Philadelphia was founded in 1682 by William Penn, an English Quaker. The city's population as of the 2020 census was 1,603,797, and over 56 million people live within 250 miles of Philadelphia. Since 1854, the city has been coextensive with Philadelphia County, the most populous county in Pennsylvania and the urban core of the Delaware Valley, the nation's seventh-largest and world's 68th-largest metropolitan region, with 6.245 million residents as of 2020. Philadelphia, often called Philly, is the largest city in the Commonwealth of Pennsylvania, the sixth-largest city in the U.S., the second-largest city in both the Northeast megalopolis and Mid-Atlantic regions after New York City, and the 68th-largest city in the world. Broad Street Line, Market–Frankford Line, PATCO Speedline
