Henry Janeway Hardenbergh was an American architect, best known for his hotels and apartment buildings, and as a "master of a new building form — the skyscraper." He worked three times with Edward Clark, the wealthy owner of the Singer Sewing Machine Company and real estate developer: The Singer company's first tower in New York City, the Dakota Apartments, and its precursor, the Van Corlear. He is best known for building apartment dwellings and luxury hotels.
Biography from Wikipedia, licensed CC BY-SA 4.0.