One Madison

One Madison is a striking skyscraper in the Flatiron District of Midtown Manhattan, standing right on Madison Square Park at East 23rd Street. Designed by CetraRuddy Architecture, the tower holds 64 luxury condominiums and, with a width-to-height ratio of one to twelve, ranks among the slimmest high-rises in the city. Its dark bronze glass facade is accented by light-colored, cantilevered bay windows on the north and east sides, giving the building a distinctive look. Construction began in 2006 but was halted when the developers went bankrupt, and the building was not completed until 2013. Visitors can reach the entrance via an adjacent five-story building with a terra-cotta and glass facade on East 22nd Street. The ground floor houses retail space, while the upper levels of the base contain mechanical rooms and exclusive amenities for residents, including an indoor pool, a spa, and a terrace with views of the park. The tall, slender structure is stabilized by a special damping system.