New York City has completed the world’s thinnest skyscraper, the 111 West 57th Street, which will soar above Central Park on Billionaire’s Row alongside the Central Park tower and other iconic supertall skyscrapers. 111 West 57th Street, also known as the Steinway Tower, is a supertall residential project by developers JDS Development Group and Property Markets Group in West Midtown in Manhattan, New York City. Located at 111 West 57th Street near Sixth Avenue, the development will be a combination of the original landmarked Steinway Building designed in 1925 by Warren & Wetmore, and a new tower addition on the adjacent site. Parkside Construction Builders is the general contractor. The world’s thinnest skyscraper will sway up to 5 feet during storms. The tower topped out in 2019 and is expected to open in early 2021. Steinway tower is one of the tallest buildings in the United States, as well as the thinnest skyscraper in the world with a width-to-height ratio of about 1:23.