Skidmore, Owings & Merrill LLP (SOM) is an American architectural, urban planning and engineering firm. It was founded in 1936 by Louis Skidmore and Nathaniel Owings in Chicago. In 1939, they were joined by engineer John Merrill. The firm opened its second office, in New York City, in 1937 and has since expanded, with additional offices in San Francisco, Los Angeles, Washington, D.C., London, Melbourne, Hong Kong, Shanghai, Seattle, and Dubai.
The Twin Towers was a common name for two 110-story skyscrapers that were part of the original World Trade Center in New York City.
2121 Avenue of the Stars, formerly known as Fox Plaza, is a 34-story, 493-foot (150 m) skyscraper in Century City, Los Angeles, California. It is owned by the Orange County–based Irvine Company.
The Citigroup Center is an office skyscraper in the Midtown Manhattan neighborhood of New York City. 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.
Two Prudential Plaza is a 64-story skyscraper located in the Loop area of Chicago, Illinois. At 995 feet (303 m) tall, it is the seventh-tallest building in Chicago as of 2022 and the 28th-tallest in the U.S., being only five feet from 1,000 feet, making it the closest of any building under 1,000. Built in 1990, the building was designed by the firm Loebl Schlossman & Hackl, with Stephen T. Wright as the principal in charge of design. It has received eight awards, including winning the Best Structure Award from the Structural Engineers Association of Illinois in 1995.
One Court Square, also known as the Citicorp Building or the Citigroup Building, is a 50-story, 673-foot (205 m) office tower in Long Island City, Queens, across the East River from Manhattan in New York City, United States. It was completed in 1989 and designed by Skidmore, Owings & Merrill for Citigroup. The building was the tallest in Queens from its completion until the topping out of Skyline Tower in 2019, and for many years was the only skyscraper in Long Island City. It is now home to telecommunications firm Altice USA, whose logo adorns the top of the building, among other tenants.
Citigroup Centre is a 243-metre (797 ft) skyscraper located on Park Street, Sydney, New South Wales, Australia. The building draws its name from Citigroup Australia who is the anchor tenant.
One Sansome Street, also known as Citigroup Center, is an office skyscraper located at the intersection of Sutter and Sansome Streets in the Financial District of San Francisco, California, United States, near Market Street. The 168 m (551 ft), 41 floor, 587,473 sq ft (54,578.0 m2) office tower was completed in 1984.
Thornton Tomasetti is a global, 1,500-plus person scientific and engineering consulting firm.
777 Tower is a 221 m (725 ft), 52-story high-rise office building designed by César Pelli located at 777 South Figueroa Street in the Financial District of Downtown Los Angeles, California.
EY Plaza, formerly known as Ernst & Young Plaza, is a 534-foot tall skyscraper in Los Angeles, California. It was completed in 1985, has 41 floors and is the 18th tallest building in Los Angeles. The tower is currently owned by Brookfield Properties Inc, and was designed by Skidmore, Owings & Merrill LLP. Even though it is in California, this building was placed in the New York skyline in the movie The Day After Tomorrow.
FourFortyFour South Flower, formerly Citigroup Center, is a 627 ft (191 m) 48-story skyscraper at 444 South Flower Street in the Bunker Hill area of downtown Los Angeles, California. At the time of its completion, in 1981, the tower was the fifth-tallest in the city.
George J. Efstathiou, FAIA, RIBA is an American architect of Greek descent. George joined Skidmore, Owings and Merrill, LLP (SOM) in 1974, where he served as Managing Partner and later Consulting Partner in the Chicago office until 2016. He is currently leading the consulting practice of Efstathiou Consulting LLC which serves clients in the architecture, planning, interiors design as well as others in the real estate and corporate communities.
