Pittsburgh | |
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Pittsburgh ( PITS-burg) is a city in the state of Pennsylvania in the United States, and is the county seat of Allegheny County. A population of about 300,286 (2019) residents live within the city limits, making it the 66th-largest city in the U.S. and the second-most populous city in Pennsylvania behind Philadelphia. The Pittsburgh metropolitan area is the anchor of Western Pennsylvania; its population of 2,324,743 is the largest in both the Ohio Valley and Appalachia, the second-largest in Pennsylvania, and the 27th-largest in the U.S.
Pittsburgh is located in the southwest of the state, at the confluence of the Allegheny River and the Monongahela River, forming the Ohio River. Pittsburgh is known both as "the Steel City" for its more than 300 steel-related businesses and as the "City of Bridges" for its 446 bridges. The city features 30 skyscrapers, two inclined railways, a pre-revolutionary fortification and the Point State Park at the confluence of the rivers. The city developed as a vital link of the Atlantic coast and Midwest, as the mineral-rich Allegheny Mountains made the area coveted by the French and British empires, Virginians, Whiskey Rebels, and Civil War raiders.Aside from steel, Pittsburgh has led in the manufacturing of other important materials — aluminum and glass — and in the petroleum industry. Additionally, it is a leader in computing, electronics, and the automotive industry. For part of the 20th century, Pittsburgh was behind only New York City and Chicago in corporate headquarters employment; it had the most U.S. stockholders per capita. Deindustrialization in the 1970s and 80s laid off area blue-collar workers as steel and other heavy industries declined, and thousands of downtown white-collar workers also lost jobs when several Pittsburgh-based companies moved out.
Hanoi | |
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Hanoi (UK: ha-, hə-NOY or US: hah-NOY; Vietnamese: Hà Nội [hàː nôjˀ] (listen)) is the capital city of Vietnam. It covers an area of 3,358.6 km2 (1,296.8 sq mi). It is the second largest city in Vietnam, with over eight million residents within the city proper and an estimated population of 20 million within the metropolitan area. Located in part of the Red River Delta, Hanoi is the commercial, cultural, and educational centre of Northern Vietnam. Having an estimated nominal GDP of US$32.8 billion as of 2018, it is the second most productive economic area of Vietnam, after Ho Chi Minh City.
The city is a settlement along the banks of the Red River. In 257 B.C, under the rule of king An Dương Vương, the citadel of Cổ Loa, nowaday Đông Anh district of Hanoi, was constructed and served as the capital of Âu Lạc. After the fall of Âu Lạc, the city was renamed to Tống Bình and ultimately Đại La. In 1010, emperor Lý Thái Tổ moved the capital to Đại La, renaming it Thăng Long (literally "Ascending Dragon"). Thăng Long would remain the political and cultural centre of the state of Đại Việt until 1802, when the Nguyễn dynasty, the last imperial dynasty of Vietnam, moved the capital to Huế.
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