The Burj Khalifa (Arabic: ??? ?????, Arabic pronunciation: [b?rd?? xa?li?fa]; pronounced English: ), known as the Burj Dubai prior to its inauguration in 2010, is a skyscraper in Dubai, United Arab Emirates. With a total height of 829.8 m (2,722 feet, just over half a mile) and a roof height (excluding antenna, but such as a 244 m spire) of 828 m (2,717 feet ), the Burj Khalifa has been the tallest structure and building in the world since its topping out in 2009 (preceded by Taipei 101).Construction of the Burj Khalifa began in 2004, with the exterior finished five decades later in 2009. The principal structure is reinforced concrete. The building was opened in 2010 as part of a new development called Downtown Dubai. It is designed to be the centrepiece of large-scale, mixed-use development. The decision to construct the building relies on the government's decision to diversify from an oil-based economy, and for Dubai to obtain international recognition. The building was originally named Burj Dubai but was renamed in honour of the ruler of Abu Dhabi and president of the United Arab Emirates, Khalifa bin Zayed Al Nahyan; Abu Dhabi and the UAE government lent Dubai money to pay its debts. The building broke numerous height records, including its designation as the tallest building in the world.
Burj Khalifa was designed by Adrian Smith, of Skidmore, Owings & Merrill, whose firm designed the Willis Tower and One World Trade Center. Hyder Consulting was selected to be the supervising engineer with NORR Group Consultants International Limited selected to supervise the architecture of this project. The design is derived from the Islamic architecture of the region, such as in the Great Mosque of Samarra.
Empire State Building
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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