Willis Tower vs Empire State Building

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The Willis Tower (formerly and informally: Sears Tower, its title until 2009) is a 110-story, 1,450-foot (442.1 m) skyscraper in Chicago. At completion in 1973, it surpassed the World Trade Center in New York City to become the tallest building in the world, a title that it held for nearly 25 years; it was also the tallest building in the Western Hemisphere for 41 years, before the new One World Trade Center surpassed it in 2013. While it held the title of'Tallest Office Building' before 2013, it dropped the title of'Tallest Man-Made Construction' after only 3 decades. The CN Tower in Toronto, which functions as a communications tower, took over the title in 1976. The Willis Tower is considered a seminal accomplishment for engineer Fazlur Rahman Khan. It is currently the third-tallest construction in the USA and the Western hemisphere -- and the 23rd-tallest in the world.

Annually, several million people visit its observation deck, the highest in the USA, which makes it one of Chicago's most popular tourist destinations. The arrangement was renamed in 2009 by the Willis Group as a term of its lease. As of April 2018, the building's largest tenant is United Airlines, which moved its corporate headquarters in 77 West Wacker Drive (then the United Building) in 2012, occupying around 20 flooring. Other major tenants include the building's namesake Willis Towers Watson and law firms Schiff Hardin and Seyfarth Shaw. Morgan Stanley plans to move into the construction in 2019 and become its fourth-largest tenant by 2020.

Source: Wikipedia

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The Empire State Building is a 102-story Art Deco skyscraper in Midtown Manhattan in New York .

It was designed by Shreve, Lamb & Harmon and built from 1930 to 1931. Its name is derived from 'Empire State', the nickname of the state of New York. The building has a roof height of 1,250 feet (380 m) and stands a total of 1,454 ft (443.2 m) tall, including its antenna. The Empire State Building stood as the world's tallest building until the building of the World Trade Center in 1970; after its collapse at the September 11, 2001 attacks, the Empire State Building was the city's tallest skyscraper until 2012. As of 2020, the building is the seventh-tallest building in nyc, the ninth-tallest finished skyscraper in the United States, the 48th-tallest on earth, and the fifth-tallest freestanding structure in the Americas. The website of the Empire State Building, located in Midtown South on the west side of Fifth Avenue between West 33rd and 34th Streets, was originally part of an early 18th-century farm. It was developed in 1893 as the site of the Waldorf--Astoria Hotel. In 1929, Empire State Inc. acquired the website and devised plans for a skyscraper there. The design for the Empire State Building was changed fifteen times until it was ensured to be the world's tallest building. Construction began on March 17, 1930, and the building opened thirteen and a half months afterward on May 1, 1931. Despite favorable publicity regarding the building's structure, because of the Great Depression and World War II, its owners failed to make a profit until the early 1950s. The building's Art Deco design, height, and observation decks have made it a popular attraction. Around 4 million tourists from around the world annually visit the building's 86th and 102nd floor observatories; an additional indoor observatory on the 80th floor opened in 2019. The Empire State Building is an American cultural icon: it has been featured in more than 250 TV shows and movies since the movie King Kong was released in 1933. A symbol of New York City, the tower has been named as one of the Seven Wonders of the Modern World by the American Society of Civil Engineers. It was ranked first on the American Institute of Architects' List of America's Favorite Architecture in 2007. Additionally, the Empire State Building and its ground-floor inside were designated city landmarks by the New York City Landmarks Preservation Commission in 1980, and were added to the National Register of Historic Places as a National Historic Landmark in 1986.

Source: Wikipedia