270 Park Avenue

270 Park Avenue, also known as the JPMorgan Chase Tower and the Union Carbide Building, was a skyscraper in the Midtown Manhattan neighborhood of New York City, United States. Built in 1960 for chemical company Union Carbide, it was designed by the architects Gordon Bunshaft and Natalie de Blois of Skidmore, Owings & Merrill (SOM). The 52-story, 707-foot (215 m) skyscraper later became the global headquarters for JPMorgan Chase. It was demolished in 2021 to make way for a taller skyscraper at the same address. At the time of its destruction, the Union Carbide Building was the tallest voluntarily demolished building in the world, and it remains the tallest voluntarily demolished building in the United States. The building occupied a full city block bounded by Madison Avenue, 48th Street, Park Avenue, and 47th Street. It was composed of two sections: a 52-story tower facing Park Avenue to the east and a 12-story annex facing Madison Avenue to the west, both surrounded by public plazas. About two-thirds of 270 Park Avenue was built over two levels of underground railroad tracks, which feed directly into Grand Central Terminal to the south. This not only prevented a basement from being built under most of the site but also required that the lobby be one story above ground level. Union Carbide's offices were designed around a grid of 5-by-5-foot (1.5 by 1.5 m) modules. The offices contained flexible furnishings and partitions, as well as luminous ceilings. The Union Carbide Building received mixed reviews during its existence, and the presence of the building's plazas helped influence the 1961 Zoning Resolution. The site was occupied by the Hotel Marguery between 1917 and 1957. Union Carbide leased the land from New York Central Railroad (later Penn Central) and announced plans for the building in 1955. Union Carbide moved into its headquarters in 1960 and acquired the underlying land in 1976 after Penn Central went bankrupt. After three years of negotiations, Union Carbide agreed in 1978 to sell the building to Manufacturers Hanover Corporation. Manufacturers Hanover moved into 270 Park Avenue in 1980 and renovated the building. Through several mergers, Manufacturers Hanover became part of JPMorgan Chase, which announced plans to demolish the building in 2018. Despite preservationists' objections, the Union Carbide Building was demolished from 2019 to 2021.

270 Park Avenue was in the Midtown Manhattan neighborhood of New York City, United States. It occupied an entire city block bounded by Madison Avenue to the west, 48th Street to the north, Park Avenue to the east, and 47th Street to the south. The land lot covered about 80,000 square feet (7,400 m2) with a frontage of 200 feet (61 m) on either avenue and 400 feet (120 m) on either street. Nearby buildings include the old New York Mercantile Library and 400 Madison Avenue to the west; Tower 49 to the northwest; 277 Park Avenue to the east; 245 Park Avenue to the southeast; and 383 Madison Avenue to the south. By the late 19th century, the Park Avenue railroad line ran in an open cut in the middle of Park Avenue. The line was covered with the construction of Grand Central Terminal in the early 20th century, spurring development in the surrounding area, Terminal City. Among the developments were office buildings such as the Chanin Building, Bowery Savings Bank Building, and New York Central Building, as well as hotels like the Biltmore, Commodore, Waldorf Astoria, and Summit. On the site of 270 Park Avenue, the developer Charles V. Paterno constructed the six-building Hotel Marguery complex, which opened in 1917. The stone-clad hotel was 12 stories high and designed in the Renaissance Revival style. By 1920, the area had become what The New York Times called "a great civic centre". A

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