Philadelphia is the largest city in the Commonwealth of Pennsylvania and the fifth-most-populous city in the United States. It is located in the Northeastern United States along the Delaware and Schuylkill rivers, and it is the only consolidated city-country in Pennsylvania. Popular nicknames for Philadelphia are Philly and The City of Brotherly Love. Philadelphia is the economic and cultural centre of the Delaware Valley, home to 6 million people and the country's fifth-largest metropolitan area.In 1682, William Penn founded the city to serve as capital of Pennsylvania Colony. Philadelphia has shifted to an information and service-based economy. Financial activities account for the largest sector of the metro economy, and it is one of the largest health education and research centres in United States. The city is also nation's fourth-largest consumer media market, as ranked by Nielsen Media Research. Philadelphia is known for its arts and culture. The cheesesteak and soft pretzel are emblematic of Philadelphia cuisine, which is shaped by the city's ethnic mix. The city has more outdoor sculptures and murals than any other American city. Philadelphia's Fairmount Park is the largest lanscaped urban park in the world. Summer is typically hot and muggy, fall and spring are generally mild, and winter is cold.