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The world's first skyscraper was built in Chicago in 1885. Since that time, the United States has been home and still is home to some of the world's tallest skyscrapers. New York City, specifically the borough of Manhattan, notably has the tallest skyline in the country. Eleven American buildings have held the title of tallest building in the world (9 in New York City).〔(【引用サイトリンク】title=Diagram of Historical Tallest Buildings )〕 New York City and Chicago have always been the centers of American skyscraper building. The 10-story Home Insurance Building, built in Chicago in 1885, is regarded as the world's first skyscraper; the building was constructed using a novel steel-loadbearing frame which became a standard of the industry worldwide. As of 2013, One World Trade Center, also referred by the symbolic name of "Freedom Tower", in New York City was proclaimed to be the tallest skyscraper in the United States. Its antenna brings the structure to a symbolic height of 1,776 feet (541 m), connoting the year The Declaration of Independence was signed, though the tip of the structure actually is measured at 1,792 ft (546.2 m).〔(【引用サイトリンク】url=http://skyscrapercenter.com/new-york-city/one-world-trade-center/98/ )〕 However, using the more common criteria for the height of a building (the roof, not antenna) the observation deck elevation and highest occupied floor of the One World Trade Center are surpassed by Chicago's Willis Tower (formerly the Sears Tower).〔(【引用サイトリンク】url=http://www.nyc-tower.com/stats/ )〕 and 432 Park Ave. Prior to the September 11, 2001 attacks in New York City and Arlington, Virginia, the twin towers of the World Trade Center occupied the second and third positions on the list below, behind Willis Tower. The North Tower stood at 1,368 feet (417 m), while the South Tower was 1,362 feet (415 m) tall. If they were still standing today, they would occupy the fourth and fifth positions on the list below. There are several supertall buildings proposed in Chicago, including the Wanda Vista Tower, which will be approximately 95 stories and about 1,144 feet tall; Wolf Point along the Chicago River; and a Rafael Vinoly-designed tower. There are several other tall structures being proposed or under construction in the city as well. Other tall buildings that are either proposed or under construction include the 1,121 foot (342 m) Comcast Innovation and Technology Center in Philadelphia, the 1,100 foot (335 m) Wilshire Grand Tower in Los Angeles, the 1,070 (326 m) Salesforce Tower in San Francisco, and the 1,010 foot (308 m) One Bayfront Plaza in Miami. ==Tallest buildings== This list ranks completed and topped out buildings in the United States that stand at least tall, based on standard height measurement. This includes spires and architectural details, but does not include antenna masts. An equal sign (=) following a rank indicates the same height between two or more buildings. The "Year" column indicates the year in which a building was completed. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「List of tallest buildings in the United States」の詳細全文を読む スポンサード リンク
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