ArchitectHenry Janeway HardenberghAmerican architect (1847–1918), 1847–1918Photograph of one of their buildings · Yarl · CC BY-SA 3.0 · Wikimedia Commons6 buildingsUnited StatesFurther readingWikipedia article↗Buildings13 West 54th StreetManhattan, United States15 West 54th StreetManhattan, United StatesPlaza HotelNew York City, United StatesRumford Falls Power Company BuildingRumford, United StatesWhitehall BuildingManhattan, United StatesWillard InterContinental WashingtonWashington, D.C., United States