Willis Tower vs Taipei 101

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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 Taipei 101 (Chinese: ??101; pinyin: Táib?i y? líng y?; stylized as TAIPEI 101), formerly called the Taipei World Financial Center (????????), is a supertall skyscraper designed by C.Y. Lee and C.P. Wang in Xinyi, Taipei, Taiwan. This building was officially classified as the world's tallest from its opening in 2004 before the 2010 completion of the Burj Khalifa in Dubai, UAE. Its elevators, capable of traveling 60.6 km/h (37.7 mph) and used to transport passengers in the 5th to 89th floor in 37 seconds, set new records upon completion. In 2011 Taipei 101 received a Platinum rating under the LEED certification system to become the tallest and largest green building in the world. The arrangement regularly appears as an icon of Taipei in international media, and the Taipei 101 fireworks displays are a regular feature of New Year's Eve broadcasts. Taipei 101's postmodernist architectural design evokes traditional Asian aesthetics in a contemporary structure employing industrial substances. Its design incorporates numerous features that allow the construction to withstand the Pacific Ring of Fire's earthquakes as well as the region's tropical storms. The tower houses restaurants and offices as well as both indoor and outdoor observatories. The tower is adjoined with a multilevel shopping mall that has the world's largest ruyi symbol as an exterior feature. Taipei 101 is possessed by Taipei Financial Center Corporation. The skyscraper started on 31 December 2004 to celebrate New Year's Eve.

Source: Wikipedia