求一篇介绍费城（是城市不是电影）的英语文章

The city of Philadelphia is the largest city in Pennsylvania and the fifth most populous city in the United States[1]. It is colloquially referred to as Philly, and known as The City of Brotherly Love (from Greek: Φιλαδέλφεια, /fi.la.ˈdɛl.fɛj.a/, "brotherly love" from philos "loving" and adelphos "brother").

The 2005 U.S. Census estimated population of the city proper is 1.4 million.[2] Philadelphia is a major commercial, educational, and cultural center for the nation. The Philadelphia–Camden–Wilmington metropolitan area is the fifth-largest in the U.S. as of the 2006 estimate with a population of 5.8 million (fourth largest according to official 2000 census).[3]

During part of the 18th century, the city was the first capital and most populous city of the United States. At that time, it eclipsed Boston and New York City in political and social importance, with Benjamin Franklin taking a large role in Philadelph