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1271 Avenue of the Americas (formerly known as the Time & Life Building) is a 48-story skyscraper on Sixth Avenue (Avenue of the Americas), between 50th and 51st streets, in the Midtown Manhattan neighborhood of New York City. Designed by architect Wallace Harrison of Harrison, Abramovitz, and Harris, the building was developed between 1956 and 1960 as part of Rockefeller Center. The building's eight-story base partially wraps around its 48-story main tower. Both sections are surrounded by a plaza, which has white-and-gray pavement in a serpentine pattern, as well as water fountains. The facade consists of glass panels between limestone columns. The lobby contains serpentine floors, white-marble and stainless-steel walls, and reddish-burgundy glass ceilings, in addition to artwork by Josef Albers, Fritz Glarner, and Francis Brennan. The ground floor also includes storefronts and originally housed La Fonda del Sol, a Latin American–themed restaurant. Each of the upper floors covers 28,000 square feet (2,600 m2), with the offices arranged around the core. The 48th floor originally contained the Hemisphere Club, which operated as a members-only restaurant during the day and was open to the public during evenings. After the media firm Time Inc. expressed its intention to move from 1 Rockefeller Plaza in the 1950s, Rockefeller Center's owners proposed a skyscraper at 1271 Avenue of the Americas to accommodate the move. Construction started in May 1957; the building was topped out during November 1958, and occupants began moving into their offices in late 1959. The New York City Landmarks Preservation Commission designated the lobby as a city landmark in 2002. Time Inc. vacated 1271 Avenue of the Americas in 2015, and the building was subsequently renovated between 2015 and 2019.

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. 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 ft (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. 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 atop 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 ft (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.