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City of Pittsburgh
Skyline of City of Pittsburgh
Official seal of City of Pittsburgh
Nickname(s): City of Bridges, Steel City, City of Champions, The 'Burgh, Iron City, Steel Town, The College City, Roboburgh
Motto: Benigno Numine ("With the Benevolent Deity")
Location in Allegheny County, Pennsylvania
Location in Allegheny County, Pennsylvania
Coordinates: 40°26′30″N 80°00′00″W / 40.44167°N 80°W / 40.44167; -80Coordinates: 40°26′30″N 80°00′00″W / 40.44167°N 80°W / 40.44167; -80
Country  United States
Commonwealth  Pennsylvania
County Allegheny
Founded November 25, 1758
Incorporated April 22, 1794 (borough)
  March 18, 1816 (city)
 • Mayor Luke Ravenstahl (D)
 • City 151.1 km2 (58.3 sq mi)
 • Land 143.9 km2 (55.5 sq mi)
 • Water 7.2 km2 (2.8 sq mi)
 • Metro 13,839 km2 (5,343 sq mi)
Elevation 372.77 m (1,223 ft)
Population (U.S. Census Estimate, 2006)
 • City 312,819
 • Density 2,174/km2 (5,636/sq mi)
 • Metro 2,370,776
Time zone EST (UTC-5)
 • Summer (DST) EDT (UTC-4)
Area code(s) 412, 724, 878
Website www.city.pittsburgh.pa.us

Pittsburgh, previously known as Pittsburg, is a city in the American state of Pennsylvania. The city is most known for its steel industry. However, with the collapse of United States steel industry in the 1980s, the economy of Pittsburgh is now mostly based on healthcare, education, technology, and financial services. It is also the home of the Pittsburgh Steelers football team, who have won the Super Bowl six times, the Pittsburgh Penguins hockey team, the University of Pittsburgh and Carnegie Mellon University. Pittsburgh is the county seat for Allegheny County. Three rivers meet in Pittsburgh.[3]

Pittsburgh is in western Pennsylvania. It has a population of 312,819 people and a metro population of almost 2,400,040 people. Pittsburgh was the most livable city in the United States in 2007. In 2014 Pittsburgh was ranked sixth in the country for polluted cities by the American Lung Association.

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