Several famous people are associated with these Allegheny County historic places including Gen. John Neville, H.J. Heinz and James etal. O'Hare.
Some of the country's most noteable architects helped create the Allegheny County places including Corps of Engineers, John Neville, Heinz Engineering Dept., Frederick Osterling, Boyd & Pratt Ingham, Walter H. Cookson, J.M. Andrews, J.E. Allison, Mellon E. P. and George Hogg. Prominent architectural styles found in Allegheny Country are Romanesque, Beaux Arts and Classical Revival.