Grant Street is the main government and business corridor in Pittsburgh, Pennsylvania. It is home to the global headquarters of U.S. Steel, Koppers Chemicals, and Oxford Development. It also is home to the seat of Allegheny County, City of Pittsburgh and the regional Federal Government offices. It is part of the Pittsburgh Central Downtown Historic District.

The Allegheny County Courthouse in downtown Pittsburgh, Pennsylvania, is part of a complex designed by H. H. Richardson. The buildings are considered among the finest examples of the Romanesque Revival style for which Richardson is well known.