It is surprising to discover, considering how many of his buildings sprouted in other cities, that this is the only building by Ludwig Mies van der Rohe in Pittsburgh. (The IBM Building in Allegheny Center was by his architectural firm, but the design was actually by one of his minions in his Chicago office.) It is an unusually long and low building by his standards, but it is otherwise a typical Miesian black box on stilts. Here we see it from across the river with a long lens.