Citigroup Center

The Citigroup Center (formerly Citicorp Center and also known by its address, 601 Lexington Avenue) is an office skyscraper in the Midtown Manhattan neighborhood of New York City, New York, U.S. Built in 1977 for Citibank, it is 915 feet (279 m) tall and has 1.3 million square feet (120,000 m2) of office space across 59 floors. The building was designed by architect Hugh Stubbins, associate architect Emery Roth & Sons, and structural engineer William LeMessurier. The Citigroup Center takes up much of a city block bounded clockwise from the west by Lexington Avenue, 54th Street, Third Avenue, and 53rd Street. Land acquisition took place from 1968 to 1973. One existing occupant, St. Peter's Lutheran Church, sold its plot on the condition that a new church building be constructed at the base of the tower. The design was announced in July 1973, and the structure was completed in October 1977. Less than a year after completion, the structure had to be strengthened when it was discovered that, due to a design flaw, the building was vulnerable to collapse in high winds. The building was acquired by Boston Properties in 2001, and Citicorp Center was renamed 601 Lexington Avenue in the 2000s. The New York City Landmarks Preservation Commission designated the Citigroup Center as a city landmark in 2016. The building's public spaces underwent renovations in 1995 and 2017. The tower's base includes four giant stilts, which are placed mid-wall rather than at the building's corners. Its roof is sloped at a 45-degree angle. East of the tower is a six-story office annex. The northwest corner of the tower overhangs St. Peter's Church at Lexington Avenue and 54th Street, a granite structure designed by Stubbins. Also at the base is a sunken plaza, a shopping concourse, and entrances to the church...