The MetLife Building is a skyscraper in the Midtown Manhattan neighborhood of New York City. Designed in the International style by Richard Roth, Walter Gropius, and Pietro Belluschi, the MetLife Building is 808 feet (246 m) tall with 59 stories. It was advertised as the world's largest commercial office space by square footage at its opening, with 2.4 million square feet (220,000 m2) of usable office space. As of 2021, the MetLife Building remains one of the 100 tallest buildings in the United States. Originally built as the headquarters for Pan American Airways, this 59-story octagonal-plan skyscraper straddles Park Ave. and dominates the air space of Grand Central and the Helmsley Building. At the time of its opening, the PanAm building had the most square-footage of office space in the world.