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. Because 1854, the city has had the identical geographic boundaries as Philadelphia County, the most populous county in Pennsylvania and the urban core of the eighth-biggest U.S. metropolitan statistical location, with above six million residents as of 2017. Philadelphia is also the financial and cultural anchor of the higher Delaware Valley, located along the reduce Delaware and Schuylkill Rivers, within the Northeast megalopolis. The Delaware Valley’s population of seven.two million ranks it as the eighth-biggest combined statistical location in the United States.

Philadelphia is one particular 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 role in the American Revolution as a meeting location 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. Several other key events occurred in Philadelphia in the course of the Revolutionary War like the 1st 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 right up until currently being overtaken by New York City in 1790 the city was also one particular of the nation’s capitals in the course of the revolution, serving as short-term U.S. capital while Washington, D.C. was beneath construction. In the 19th century, Philadelphia grew to become a key 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 three biggest reported ancestry groups in the city as of 2015. In the early 20th century, Philadelphia grew to become a prime location for African Americans in the course of the Fantastic Migration soon after the Civil War, as properly as Puerto Ricans. The city’s population doubled from one particular million to two million men and women between 1890 and 1950.

The Philadelphia area’s several universities and colleges make it a top examine location, as the city has evolved into an educational and financial hub. As of 2019, the Philadelphia metropolitan location is estimated to produce a gross metropolitan merchandise (GMP) of $490 billion. Philadelphia is the center of financial exercise in Pennsylvania and is house to 5 Fortune one thousand businesses. The Philadelphia skyline is expanding, with a market of practically 81,900 industrial properties in 2016, like numerous nationally prominent skyscrapers. Philadelphia has much more outside sculptures and murals than any other American city. Fairmount Park, when combined with the adjacent Wissahickon Valley Park in the identical watershed, is one particular of the biggest contiguous urban park regions 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.eight billion, generating an estimated $11 billion in complete financial effect in the city and surrounding four counties of Pennsylvania. Philadelphia has also emerged as a biotechnology hub.