Downtown Pittsburgh, colloquially referred to as the
Golden Triangle and officially the
Central Business District, is the urban downtown center of
Pittsburgh. It is located at the confluence of the
Allegheny River and the
Monongahela River whose joining forms the
Ohio River. The "triangle" is bounded by the two rivers. The area features offices for major corporations such as
PNC Bank,
U.S. Steel,
PPG,
Bank of New York Mellon,
Heinz,
Federated Investors and
Alcoa. It is where the fortunes of such industrial barons as
Andrew Carnegie,
Henry Clay Frick,
Henry J. Heinz,
Andrew Mellon and
George Westinghouse were made.