This list of tallest buildings by city ranks cities by the height of their tallest completed building. Tall buildings, such as skyscrapers, are intended here as enclosed structures with continuously habitable floors. This definition excludes non-building structures, such as observation towers, and radio towers.
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A city's tallest building may become iconic symbols of their respective cities, such as The Shard in London, Willis Tower (formerly known as the Sears Tower) in Chicago, and the Petronas Towers in Kuala Lumpur (which remained the tallest buildings in Kuala Lumpur until the completion of Merdeka 118). Over time, they may be recognized as notable tourist attractions and landmarks.
Currently, the five cities whose tallest building is among the tallest in the world are Dubai, Kuala Lumpur, Shanghai, Mecca, and Shenzhen. Most of the cities in the list constructed their tallest building in the 21st century, including all of the top ten.
