ArchitectRutan & Russellformer American architectural office, active in Pittsburgh, PennsylvaniaPhotograph of one of their buildings · Generic1139 · CC BY 3.0 · Wikimedia Commons2 buildingsUnited StatesFurther readingWikipedia article↗BuildingsPittsburgh Mercantile Company BuildingPittsburgh, United StatesWilliam Pitt UnionPennsylvania, United States