Downtown
Pittsburgh, Pennsylvania, officially called the Golden Triangle or Central Business District, is a very dense, urban and walkable downtown located at the confluence of the
Allegheny River and the
Monongahela River whose joining forms the
Ohio River. The "triangle" is formed by the two rivers; it is "golden" because it is the city's commercial center, where major corporations such as
PNC Bank,
U.S. Steel,
PPG,
Mellon Financial,
Heinz and
Alcoa are based, and where the fortunes of such industrial barons as
Andrew Carnegie,
Henry Clay Frick and
George Westinghouse were made.
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