Philadelphia, acknowledged colloquially as Philly, is the biggest city in the U.S. state and Commonwealth of Pennsylvania, and the sixth-most populous U.S. city with a 2018 census-estimated population of one,584,138. Considering that 1854, the city has had the same geographic boundaries as Philadelphia County, the most populous county in Pennsylvania and the urban core of the eighth-biggest U.S. metropolitan statistical area, with over six million residents as of 2017. Philadelphia is also the financial and cultural anchor of the better Delaware Valley, positioned along the lower Delaware and Schuylkill Rivers, within the Northeast megalopolis. The Delaware Valley’s population of 7.two million ranks it as the eighth-biggest combined statistical area in the United States.

Philadelphia is 1 of the oldest municipalities in the United States. William Penn, an English Quaker, founded the city in 1682 to serve as capital of the Pennsylvania Colony. Philadelphia played an instrumental position in the American Revolution as a meeting place for the Founding Fathers of the United States, who signed the Declaration of Independence in 1776 at the Second Continental Congress, and the Constitution at the Philadelphia Convention of 1787. A number of other key events occurred in Philadelphia in the course of the Revolutionary War like the Very first Continental Congress, the preservation of the Liberty Bell, the Battle of Germantown, and the Siege of Fort Mifflin. Philadelphia remained the nation’s biggest city until being overtaken by New York City in 1790 the city was also 1 of the nation’s capitals in the course of the revolution, serving as short-term U.S. capital although Washington, D.C. was under building. In the 19th century, Philadelphia grew to become a major industrial center and a railroad hub. The city grew from an influx of European immigrants, most of whom came from Ireland, Italy and Germany—the 3 biggest reported ancestry groups in the city as of 2015. In the early 20th century, Philadelphia grew to become a prime destination for African Americans in the course of the Excellent Migration after the Civil War, as nicely as Puerto Ricans. The city’s population doubled from 1 million to two million folks amongst 1890 and 1950.

The Philadelphia area’s many universities and schools make it a best examine destination, as the city has evolved into an educational and financial hub. As of 2019, the Philadelphia metropolitan area is estimated to produce a gross metropolitan product (GMP) of $490 billion. Philadelphia is the center of financial action in Pennsylvania and is home to 5 Fortune one thousand organizations. The Philadelphia skyline is expanding, with a market of nearly 81,900 commercial properties in 2016, like many nationally prominent skyscrapers. Philadelphia has far more outside sculptures and murals than any other American city. Fairmount Park, when combined with the adjacent Wissahickon Valley Park in the same watershed, is 1 of the biggest contiguous urban park areas in the United States. The city is acknowledged for its arts, culture, cuisine, philadelphia escorts and colonial background, attracting 42 million domestic tourists in 2016 who invested $six.8 billion, producing an estimated $11 billion in complete financial impact in the city and surrounding four counties of Pennsylvania. Philadelphia has also emerged as a biotechnology hub.