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Pittsburgh (pronounced /ˈpɪtsbərɡ/) is the seicont-lairgest ceety in the U.S. Commonweel o Pennsylvanie an the coonty seat o Allegheny Coonty. Regionally, it anchors the lairgest urban aurie o Appalachie[1] an the Ohio River Valley, an naitionally, it is the 22nt-lairgest urban aurie in the Unitit States.[2][3] The estimatit population o the ceety in 2009 wis 311,647,[4] while the seiven-coonty metropolitan aurie wis estimatit at 2,354,957.[5] Dountoun Pittsburgh retains substantial economic influence, rankin at 25t in the naition for jobs athin the urban core an 6t in job density.[6] The characteristic shape o Pittsburgh's central business destrict is a triangular tract carved bi the confluence o the Allegheny an Monongahela rivers, which form the Ohio River. The ceety features 151 heich-rise biggins,[7] 446 brigs,[8] two inclined railways, and a pre-revolutionary fortification. Pittsburgh is kent colloquially as "The Ceety o Brigs" and "The Steel Ceety" for its mony brigs an umwhile steel manufacturin base.

Sister ceeties[eedit | eedit soorce]

Pittsburgh haes seiventeen sister ceeties:[9][10]

References[eedit | eedit soorce]