
Morning sun illuminates the Cathedral of Learning.

Louis Sullivan was of the opinion that Daniel Burnham’s success in the classical style was a great blow to American architecture. But what could be more American than a Burnham skyscraper? Like America, it melds its Old World influences into an entirely new form, in its way as harmonious and dignified as a Roman basilica, but without qualification distinctly American.

Forever overshadowed by its taller neighbor the Frick Building, the Allegheny Building, built in 1906, is also by Daniel Burnham, and also a Frick project. It is one of his spare, almost modernistic designs, and it is fascinating to see how well the classical vocabulary adapts to twentieth-century simplicity.