The Diamond Biulding, at Fifth and Liberty Avenues, is a curiously shaped irregular pentagon, one of the many buildings forced into odd shapes by the colliding grids along Liberty Avenue. Except for the shape, it’s a fairly standard beaux-arts tower, with base, shaft, and cap, and an exuberant bronze cornice at the very top. The building was designed by MacClure and Spahr, a Pittsburgh firm that gave us several other distinguished buildings, including the Union National Bank building on Fourth Avenue.
Father Pitt 
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