The Western Union Telegraph Building was a building at Dey Street and Broadway in the Financial District of Manhattan in New York City. The Western Union Building was built with ten above-ground stories rising 230 feet (70 m). The structure was originally designed by George B. Post, with alterations by Henry Janeway Hardenbergh. It is considered one of the first skyscrapers in New York City.

Henry Janeway Hardenbergh FAIA 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.